The department shall issue a license to any applicant who meets the following requirements:

(1) Successful completion of an educational program approved by the board, the minimum standard of which shall be the successful completion of a doctorate degree program in naturopathy which includes a minimum of two hundred postgraduate hours in the study of mechanotherapy from an approved educational program, or successful completion of equivalent alternate training that meets the criteria established by the board. The requirement for two hundred postgraduate hours in the study of mechanotherapy shall expire June 30, 1989;

(2) Successful completion of any equivalent experience requirement established by the board;

(3) Successful completion of an examination administered or approved by the board;

(4) Good moral character; and

(5) Not having engaged in unprofessional conduct or being unable to practice with reasonable skill and safety as a result of a physical or mental impairment.

The board shall establish what constitutes adequate proof of meeting the above requirements. Any person holding a valid license to practice drugless therapeutics under chapter 18.36 RCW upon January 1, 1988, shall be deemed licensed pursuant to this chapter.