No. 3 Electronic and Postal Communications 2010 51 (4) The Authority shall be entitled at any time, by notice published in the Gazette, to modify for the remainder of the calendar year concerned, any list published pursuant to sub-section (1) of this section, subject to a notice period of at least four weeks. Prices for services to the public offered by licensees holding a dominant position 63.(1) Any application service licensee or content service licensee that has, for the calendar year in question, been deemed to hold a dominant position in a given electronic communications market in accordance with section 60 of this Act, shall, as concerns that electronic communications market- (a) submit to the Authority for its prior approval the prices it intends to charge to the public for each applications service and each content applications service, together with a detailed justification of such prices; and (b) refrain from applying the prices in question until they have been approved by the Authority in accordance with sub-section (2). (2) Subject to sub-section (4), the Authority shall issue a written decision approving or disapproving the prices so submitted, together with the reasons for such decision, within four weeks of the receipt of submission. (3) The Authority shall base its decision on the extent to which the prices proposed by the licensee(a) in respect of the principles set forth in section 31(2); (b) are reasonably cost oriented; and (c) meets criteria as the Authority may reasonably consider relevant. (4) The Authority may make reasonable requests for additional information from the applications service licensee or content service licensee concerned and, where it does so, the time limit set forth in sub-section (2), shall recommence upon receipt of the additional information requested.