Electronic Communications and Transactions [No. 4 of 2021 151 (2) The following entities shall form part of the national public key infrastructure: (a) Government entities; and (b) entities providing certification services to entities whose information infrastructure has been declared as critical under the applicable written law. 30. (1) A licensee may, at any time during the validity of the licence, apply to the Authority for variation of the terms and conditions of the licence or any matter relating to the licence. Variation of licence (2) The National Root Certification Authority shall consider the application under subsection (1) and may grant or reject the application. (3) The National Root Certification Authority may, on its own motion, vary the terms and conditions of a licence where— (a) the variation is necessary in the public interest; or (b) the variation is necessary to address the concerns of the members of the public or subscribers. (4) The National Root Certification Authority shall, before making any variation of the terms and conditions of a licence under this section, notify the licensee— (a) of its intention to vary the licence in the manner specified in the notice; and (b) specifying the period, not being less than thirty days from the date of service of the notice on the licensee, within which a written representation in respect of the proposed variation may be made to the National Root Certification Authority by the licensee. (5) Where a licence is varied under subsection (1), the National Root Certification Authority shall not refund any fees paid for with respect to the licence. 31. (1) A licensee shall, where a licensee decides not to continue providing the services relating to the licence, notify the National Root Certification Authority in writing and shall agree with the National Root Certification Authority on the terms and conditions of the surrender of the licence, with particular reference to anything done or any benefit obtained under the licence. (2) Where a licence is surrendered under sub- section (1)— (a) the licence shall lapse and the licensee shall cease to be entitled to any benefits arising from the licence; Surrender of licence