7. The following methods of monitoring compliance of a child with the requirements of a movement restriction condition are prescribed for the purposes of section 70(14)(a) of the Act, and may be specified in the supervision requirement–
(a)radio and electronic monitoring of the child’s presence at or absence from the accommodation at which they are required to reside, or any address or location which they are required not to enter, by means of a regular radio signal transmitted by a transmitter device attached to the child with the transmitted signal received by a radio receiving and monitoring service located at such accommodation address or location, with the relevant information received and processed by said radio receiving and monitoring device periodically passed by telephone line to a central computer at a monitoring centre; and
(b)radio and electronic monitoring of the child’s presence at or absence from the accommodation at which they are required to reside, or any address or location which they are required not to enter, by a mobile receiver which receives radio signals transmitted by transmitter device attached to the child,
but the method of monitoring referred to in paragraph (b) above shall not be used unless it is not reasonably practicable to use the method described in paragraph (a) above.