Any part of such joint fund not expended during the year for which it is set apart and apportioned may be expended on class I, II, or III highways during any succeeding year at the discretion of the commissioner of transportation.
RSA 235:19
1935, 17:5. RL 100:20. 1945, 188:1, part 12:10. 1950, 5:1, part 9:1, par. 2. RSA 240:10. 1981, 87:1. 1985, 402:6, I(b)(6). 1988, 245:7, eff. June 29, 1988.