The board shall issue to any person a resident trainee license to practice as a resident trainee and perform services at a particular establishment under the personal supervision of a specified licensed mortician within the state of Idaho who has complied with and fulfilled all of the following requirements:
(1) Has attained the age of eighteen (18) years, and is a resident of the state of Idaho.
(2) Is of good moral character.
(3) Has graduated from an accredited high school or has received an equivalent education as determined by the standards set and established by the state board of education.
(4) Has filed an application with the board as required by this chapter and paid the required filing fee. Provided further, that the board shall make the determination of qualifications of all applicants within a reasonable time after the filing of an application with the board. Provided further, no person shall be eligible to be licensed as a resident trainee for a total cumulative period of more than three (3) years in the state of Idaho unless approved by the board for good cause. The three (3) year limitation includes all time practicing as a resident trainee or apprentice for a mortician license, funeral director license, or both.