The board of health shall issue or deny certification within 15 days after receiving an application for certification except that, in case the board finds the data submitted by an applicant incomplete, the time for acting thereon shall be extended by 15 days beyond the date of submission of adequate supplementary or amendatory data. Denial of certification shall be supported by a statement of the reasons for such action.

L.1954, c. 199, p. 748, s. 6.