Applicability of this article to actions and matters occurring or arising before and after the effective date

§ 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.