A notice or other document required or authorised by these regulations to be served on or given to the Minister or the Department may be served or given—
(a) by sending it by registered post addressed to the Department at: GPO Box 2607 Adelaide, South Australia, 5001; or
(b) by leaving it at—
(i) the office of the Environment Protection Authority at Level 2, 211 Victoria Square, Adelaide; or
(ii) any other office specified by the Minister by notice in the Gazette,
with a person who is apparently—
(iii) over 16 years of age; and
(iv) in the employment of the Department.