All notices, offers, disclosures, documents, acceptances and other writings required by this chapter shall be personally served upon the intended recipient or served by registered or certified mail, return receipt requested. Service by mail upon any tenant in possession shall be to the address of the tenant’s rental unit. Service by mail to any tenant not in possession shall be to the last known address of such tenant, or lacking such address, to the address of such tenant’s rental unit. The developer shall indicate his or her mailing address in the notices required by SCC 6.64.040 and 6.64.050. (Amended by Res. 79-339, Nov. 13, 1979).