121. Agency. - (1) The authorisation of an agent for the purposes of the Act and these rules shall be in Form 26 or in the form of a power of attorney.
(2) Where any authorisation has been made under sub-rule (1) service upon the agent of any document relating to any proceeding or matter under the Act or these rules shall be deemed to be service upon the person so authorising him; all communications directed to be made to a person in respect of any proceeding or matter may be addressed to such agent, and all appearances before the Controller relating thereto may be made by or through such agent.
(3) Notwithstanding anything contained in sub-rules (1) and (2), the Controller may, if it is considered necessary, require the personal signature or presence of an applicant, opponent or party to such proceeding or matter.
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