1Any area and any body which immediately before the commencement of this Act was a port health district or a port health authority by virtue of section 5 of the [1936 c. 49.] Public Health Act 1936 (which related to former port sanitary districts and port sanitary authorities) shall continue to be known as and styled a port health district or a port health authority, as the case may be; and any reference in any Act or other document to port sanitary districts or port sanitary authorities shall be construed accordingly.