Executive Summary: Key Legal and Evidentiary Issues

• Whether coal purchased by Teck Metals Ltd. for use in its smelting operations qualified for a PST exemption as a "direct agent" under s. 38(2) of the Provincial Sales Tax Exemption and Refund Regulation.

• Interpretation of the phrase "obtained for use" in the context of a Use Based Exemption, particularly where a single purchase serves both taxable and potentially exempt purposes.

• Application of the exclusion in s. 38(3)(a), which disqualifies substances obtained for use to produce energy or as a source of energy.

• Factual dispute over whether the heat generated by coal in the Reduction Process was incidental or essential to the chemical reaction at issue.

• Burden of proof principles in tax appeals, including the taxpayer's onus to disprove the Minister's factual assumptions.

• Relevance of legislative history and the bundled purchase provisions of the Provincial Sales Tax Act to the interpretation of overlapping exemptions and exclusions.

Background and facts of the case

Teck Metals Ltd. operates a manufacturing plant in Trail, British Columbia, where it processes raw materials into products including zinc, lead, silver, gold, and fertilizer, which are generally exported or sold to companies for further manufacturing. As part of its smelting operations, Teck engages in fuming recovery of residual metals using two slag fuming furnaces, SFF#2 and SFF#3. SFF#2 is used to recover residual metals from recycled products, while SFF#3 recovers residual metals from primary slag. In SFF#2, coal is utilized in two sequential two-hour phases as part of a four-hour batch process: during the first phase (the "Heat Process"), coal is used solely to produce heat to bring the slag up to the required temperature; during the second phase (the "Reduction Process"), 65% of the coal is used as a reducing agent to recover metal oxides in the fuming process, while 35% is used as a source of energy to maintain the temperature required for the Reduction Process to occur. In SFF#3, the slag is already at the required temperature upon entering the furnace, and the furnace operates under reducing conditions for the entire cycle, with coal also burned to maintain the temperature of the slag. Coal is essentially composed of three components: 23% volatiles, 12% ash, and 65% carbon.

For many years, Teck self-assessed PST on the basis that 65% of the coal used in the Reduction Process (corresponding to its carbon content) was exempt, while the remaining 35% was taxable. The Minister audited some of Teck's purchases for the period between May 1, 2015, and December 31, 2016, and on April 29, 2019, issued a notice of assessment for $192,714.78 for failure to pay tax on the Claimed Exemption of the Reduction Process coal (interest was later removed from the assessed amount). The Minister confirmed the Assessment in full on January 21, 2021, on the basis that once any amount of the Reduction Process coal was used as an energy source, the Exclusion operated so that none of the Reduction Process coal qualified for the Exemption. Teck then appealed to the Supreme Court of British Columbia.

Statutory framework and clauses at issue

The dispute turned on the interaction between two provisions of the Provincial Sales Tax Exemption and Refund Regulation, B.C. Reg. 97/2013. Section 38(2) (the "Exemption") provides that a chemical substance, catalyst, or direct agent "obtained for use" in processing or manufacturing tangible personal property for sale or lease, and to produce or modify a reaction essential for that processing or manufacturing, is exempt from tax imposed under Part 3 of the Act (other than Division 9). A "direct agent" is defined in s. 38(1) as "a substance that produces or modifies a chemical reaction and that is consumed in the chemical reaction to the point of destruction or dissipation or uselessness for any other purpose." Section 38(3)(a) (the "Exclusion") provides that the Exemption does not apply to a chemical substance, catalyst, or direct agent obtained "for use to produce energy or as a source of energy, unless the chemical substance, catalyst or direct agent is electricity for use in an electrolytic process." The parties agreed that the coal used in the Reduction Process qualified as a "direct agent," narrowing the dispute to two issues: whether the coal was "obtained for use" in the Reduction Process, and whether the Exclusion nevertheless applied.

The Court's interpretation of the Exemption

Justice Latimer rejected the Province's restrictive interpretation that Teck could not claim the Exemption because it did not know, at the time of purchase, in which furnace or process each piece of coal would be used. The Court characterized the Exemption as a "Use Based Exemption," where the tax incidence arises at one point in time but actual use occurs at a future date, meaning the purchaser's bona fide intent and expectation at the time of purchase governs eligibility. The evidence showed that Teck purchases all the coal used in both processes at the same time, by the metric ton, in rail carloads, approximately every eight days, guided by a coal ordering schedule that reflects the scheduled operations of each slag fuming furnace. Although the Heat Process and Reduction Process coal are aggregated into a single order and commingled in storage bins, Teck knows with a high degree of certainty the specific intended and expected quantities destined for each process. The Court held that the Province's interpretation imposed a restrictive requirement that strained the meaning of "obtained for use" and made no practical or commercial sense, particularly since it would require Teck to implement costly and impractical operational changes without any purposive rationale. The Court further held that the bundled purchase provisions in s. 26 of the Act evidence the legislature's intent that exemptions apply where taxable and non-taxable components are acquired together for a single price, and that in a Use Based Exemption the "use" of the property—not its type—determines taxable status.

The Court's interpretation of the Exclusion

Although Teck succeeded on the Exemption issue, the Court held that the Exclusion nevertheless applied. Teck bore the burden of disproving the Minister's factual assumptions, including that 35% of the Reduction Process coal in SFF#2 is used as a source of energy to maintain the temperature required for the Reduction Process to occur, that SFF#3 also burns coal to maintain the temperature of the slag, and that Teck used the coal as both a direct agent and a source of energy. The Court found that Teck had not discharged this burden: the heat produced was required, anticipated, and factored into the purchase of the coal, and could not therefore be characterized as "incidental." Turning to the text of s. 38(3)(a), Justice Latimer emphasized that the Exclusion contains no qualifiers such as "primarily," "substantially," or "for the primary purpose of," even though such qualifiers appear elsewhere in the Act and Regulation, including within other paragraphs of s. 38(3) itself. The plain and unambiguous words of the provision capture any use to produce energy or as a source of energy, regardless of whether the substance also serves another purpose.

Legislative history and supporting authorities

The Court's textual conclusion was reinforced by the legislative history. The Exemption was first provided for in the 1960 version of the Social Service Tax Act, R.S.B.C. 1960, c. 361, and was largely mirrored in the 1979 enactment. The Exclusion was first enacted in 1987 through the Miscellaneous Statutes Amendment (No. 5) 1987, fifty-one days after this Court's decision in Canada Cement Lafarge Ltd. v. British Columbia (Min. of Fin.), in which natural gas used as a source of heat energy was held to meet the terms of the Exemption because the heat energy produced the chemical reactions required to transform the mixture to clinker. The BC Ministry of Finance Tax Interpretation Manual confirms that the amendments were made retroactive to clarify the original legislative intent and to avoid potential revenue loss from additional litigation following Canada Cement Lafarge. Subsequent authorities, including Fiberglas Canada Inc. v. British Columbia and Aljane Greenhouses Ltd. v. British Columbia (with leave to appeal refused by the Court of Appeal in Aljane BCCA), support the view that if substances produce energy, then the Exclusion applies whether that is the purpose of the use or not.

Ruling and outcome

Justice Latimer concluded that although the manner in which Teck obtained coal for the Reduction Process did not disqualify it from the Exemption, the coal was nevertheless excluded by operation of s. 38(3)(a) because its role in producing heat was necessary and anticipated rather than incidental. The petition was dismissed, with the respondent—His Majesty the King in Right of the Province of British Columbia—emerging as the substantially successful party and awarded costs at Scale B. The assessment confirmed by the Minister was in the amount of $192,714.78, representing the unpaid PST on the Reduction Process coal, which remains payable as a consequence of the Court's ruling.

Note: This summary is provided for informational purposes only and does not constitute legal advice. For guidance on how this decision may apply to specific circumstances, please consult a qualified legal professional.