Information and Communication Technologies [No. 15 of 2009 157 (3) The Authority may exercise the powers conferred under subsection (1) where— the holder of an individual assignment fails to make proper and efficient use of the frequency bands, electronic addresses or numbers assigned to the holder; the holder of an individual assignment fails to comply with the provisions of this Act or the terms and conditions of the individual assignment; the holder of an individual assignment contravenes the provisions of any written law relevant to the individual assignment; the holder of an individual assignment fails to comply with any directive, declaration or other guidelines made by the Authority; (e) the holder of an individual assignment has ceased, however briefly, to fulfil the eligibility requirements under this Act; or 0 the Authority has reasonable grounds to believe that it is in the public interest that it exercises the powers. (4) The Authority shall, before effecting a modification, suspension or withdrawal under this section give notice to the assignee— stating that it proposes to the notice; and act in the manner specified in specifying the time, not being less than thirty days from the date of service of the notice on the assignee within which written representation in respect of the proposed actions may be made. (5) The Authority shall, upon receipt of any representation referred to in subsection (4), consider the representation and may— reject the representation; amend the proposed actions in accordance with the representation or otherwise; or (c) direct the assignee to effect, within such time as the Authority may specify, the proposed actions specified in the notice or such actions as subsequently amended by the Authority.