§ 3301. Applicability of this article to actions and matters occurring
or arising before and after the effective date. Unless otherwise
expressly provided, or unless the context otherwise requires:

(a) the provisions of this article shall govern and control the
possession, manufacture, dispensing, administering, and distribution of
controlled substances with respect to any matter, act or omission,
arising or occurring on or after the effective date hereof;

(b) the provisions of this article do not apply to or govern any
matter, act, or omission arising or occurring prior to the effective
date hereof. Such matters, acts, or omissions must be governed and
construed according to provisions of law existing at the time such
matter, act or omission arose or occurred in the same manner as if this
article had not been enacted.