Section 23G. An applicant for licensure as an occupational therapist shall:
(a) successfully completed an accredited occupational therapist educational program approved by the board,
(b) successfully completed the therapist level field work requirements as stipulated in the essentials of an accredited educational program for the occupational therapist or its equivalent,
(c) successfully passed an examination approved by the board for licensure as an occupational therapist. Such examination shall be written and shall test the applicants' knowledge of the basic and clinical sciences related to the occupational therapy theory and practice, including the applicant's professional skills and judgements in the utilization of occupational therapy techniques and methods, and such other subjects as the board may deem useful to determine the applicant's fitness to act as an occupational therapist. The examination shall be conducted by the board at least twice each year and at times and places to be determined by the board; provided, however, that the board may utilize any existing national examination that meets the requirements in this section.