Any notice which an association is required or shall desire to give to any of its investors may be given either by personal service thereof upon such investor or by mailing the same, postage prepaid, addressed to such investor at his last post office address given by such investor to such association for the purpose of mailing of notices, or, if no such address shall have been so given, then at the city or town in which the principal office in this territory of such association is located and any notice given by mail as aforesaid shall be deemed to have been given upon deposit thereof in the mails; provided, however, that in the case of any investor whose address as aforesaid six hundred miles from the place of mailing such as aforesaid, the time within which such investor may exercise any right or remedy following the giving of such notice shall be extended one day for each unit of six hundred miles or fraction of such unit between such address and such place of mailing, not to exceed in any case, however, an extension of ten days.

SOURCE: GC § 41406.