27. Service of notices 

(1) Notices under the Act or the rules made thereunder may be served by any of the following methods, namely:
(i) by delivering or tendering a copy of the notice to the addressee or any adult member of his family residing with him or to a person regularly employed by him; or
(ii) by Registered post :
Provided that, if upon an attempt having been made to serve any such notice by any of the above mentioned methods the authority under whose orders the notice was issued is satisfied that the addressee is keeping out of the way for the purpose of avoiding service or that for any other reasons, the notice cannot be served by any of the above mentioned methods, the said authority shall order the service of the notice to be effected by affixing a copy thereof on some conspicuous part of the addressee `s place of work or residence last notified by him and such service shall be deemed to have been made on the addressee personally.

(2) When the serving officer delivers or tenders a copy of the notice to the addressee personally or to any of the persons referred to in Clause (i) to sub-rule (1), he shall require the signature of the person to whom the copy is so delivered or tendered to an acknowledgement of service endorsed on the original notice.

(3) When the notice is served by affixing a copy thereof in accordance with the sub-rule (1) the serving officer shall return the original to the authority which issued a notice with a report endorsed thereon or annexed thereto stating that he so affixed the copy, the circumstances under which he did so and the name and address of the person, if any, by whom the addressee `s place of work or residence is or was located was identified and in whose presence the copy was affixed. The serving officer shall also obtain the signature or thumb impression of the person identifying the addressee`s place of work or residence to him report.

(4) The authority under whose orders the notice was issued shall, on being satisfied from the report of the messenger or the postal acknowledgement or by taking such evidence as he deems proper that the notice has been served in accordance with the rule, record the fact and make an order to that effect.

(5) If the authority is not satisfied that the notice has been properly served, he may after recording an order to that effect, direct the issue of a fresh notice.