Cities: income tax; administration, enforcement, and collection procedures; modify. Amends secs. 6 & 9, ch. 1, secs. 3, 73, 84, 85, 86a, 86b, 86c, 91, 92 & 93, ch. 2 of 1964 PA 284 (MCL 141.506 et seq.) & adds sec. 92a to ch. 2.