Application for certification shall be in writing and shall be made on a formal application blank when such blanks are provided by the board, and each application shall include such engineering data as shall be prescribed by said standards for construction.

Copies of all applications and the accompanying engineering data for certifications to cover 50 or more realty improvements shall be filed with or mailed to the State Department on the date on which application is made to the board.

Copies of all certifications by boards of health covering 50 or more realty improvements shall be mailed to the State Department by the board issuing the same on the date of issue.

L.1954, c. 199, p. 748, s. 5.