(b) In addition to the basic course of training and education, all appointive assessors and any assessor elected to a six-year term shall also complete additional courses in a continuing training and education program prescribed by the commissioner pursuant to the provisions of this title. 6. Training; services by state; county cooperation. The commissioner shall provide training programs including but not limited to courses of training and education required to be completed by local officers and employees and by candidates for certification as eligible for the position of assessor in accordance with the provisions of this title. Such programs shall be provided by the commissioner for counties, cities and towns to which this title is applicable. Counties shall cooperate with the commissioner in providing such programs. 7. Indefinite term for assessors. Notwithstanding the provisions of subdivision two of this section, the office of assessor shall have an indefinite term (a) where the office of assessor is a full time position as determined by the local legislative body and on or after August first, nineteen hundred seventy is classified in the competitive class of the civil service at the request of the local legislative body or (b) where on July thirty-first, nineteen hundred seventy the office of assessor is classified in the competitive class of the civil service and has an indefinite term pursuant to law.