Mack's term as mayor, was marked by a single-minded and innovative approach to the local governance issues facing North Sydney at the time. Mack began his term as mayor by selling the mayoral car to help buy community buses. During his term as mayor, North Sydney Council introduced the "open government policy" which honoured a promise of openness and transparency of council decisions, and established a precinct committee system, which allowed for greater citizen input in council issues. The pioneering North Sydney Heritage Study was released in 1982 and in 1989 the new Local Environmental Plan was gazetted.