Under which act would you find regulations pertaining to control of drug substances?

The correct answer is found in the context of laws specifically addressing the regulation of controlled substances. The Control Drug Substance Act is focused on the management, distribution, and legal framework surrounding drugs and controlled substances within a jurisdiction. This Act sets forth the legal definitions, classifications, and penalties associated with various drug offenses, thus providing a structured approach to drug control in order to combat issues related to substance abuse and trafficking.

In contrast, the Access to Information Act primarily deals with the transparency and disclosure of information held by government institutions. The Labour Code Operational Health and Safety focuses on workplace safety regulations and standards, which do not directly address drug substances. The Public Service Employment Act governs the employment practices and regulations for public service employees and is not related to drug substances either.

The focus of the Control Drug Substance Act on drug regulation clearly distinguishes it as the relevant legislation for questions concerning the control of drug substances.