Source. 1949, 258:1, par. 16-a. 1951, 145:1. RSA 208:5. 1955, 136:1. 1959, 74:1. 1967, 172:1. 1971, 545:2. 1973, 72:19. 1977, 247:9; 252:7; 556:1. 1978, 40:3, I. 1981, 108:3; 498:3. 1985, 291:3. 1986, 214:3. 1988, 213:4. 1994, 369:3. 1995, 153:1. 1996, 108:6. 2001, 252:1, eff. Jan. 1, 2002; 252:2, eff. Jan. 1, 2003. 2015, 186:6, eff. July 1, 2015. 2018, 324:8, eff. Aug. 24, 2018.