Any applicant who holds a license or certificate to practice landscape architecture issued to the applicant upon examination by a national certification body recognized by the board as prescribed by rule, or by a board of examiners in any other state, territory, or possession of the United States, the District of Columbia, or of any foreign country, if the requirements for such license or certificate were, at the time it was issued, in the opinion of the board, equal to or higher than the requirements of this state, may be licensed without further examination.