Subject to subsection (b) of this section, the Board may waive any examination requirement of this title for an applicant who is licensed or registered as an environmental health specialist or its equivalent in another state. The Board may grant a waiver only if the applicant: Pays the application fee required by § 21–303 of this subtitle; and Provides adequate evidence that the applicant: Meets the qualifications otherwise required by this title; Became licensed or registered to practice as an environmental health specialist or its equivalent in the other state after passing in that state an examination as a condition of licensure or registration; and Has performed at least 24 months of compensated work as an environmental health specialist or its equivalent in the other state.