Every summons, notice, order or other document required by this Act or any rule or regulation made thereunder and all decisions of the Authority and permission given by it shall be authenticated by the signature of the Chief Executive Officer or any other officer authorised by the Authority in this behalf and shall be deemed to have been duly served upon the party or parties concerned if the service has been effected in anyone of the following manner, namely:—
(i) by personal service;
(ii) by registered post to the last known address of the person;
(iii) in case of failure of service of such summons, notice, etc., under any mode mentioned in items (i) and (ii) above, by affixing it at the house or principal place of business of the party concerned, as the case may be; or
(iv) in case of failure of service of such summons, notice, etc., under any mode mentioned in items (i) to (iii) above, by publication in one prominent Malayalam daily and one English daily newspaper having wide circulation in the locality:
Provided that,—
(a) in case the party to be served is a registered company, a partnership firm or a body corporate, a local authority, a society or other body, it shall be served upon the principal officer of the firm, company, authority or organisation and it shall then be deemed to have been duly served on each director, partner or member of such firm, company, authority or organisation, as the case may be;
(b) in case the party to be served is a minor or a lunatic, it shall be served upon his guardian.