The requirements on regional assemblies to provide periodic updates to local authorities are set out in S.I. No. 573/2014 - Local Government Act 1991 (Regional Assemblies) (Establishment) Order 2014.
Sections 38(1) and (2) of the S.I. provide as follows:
38. (1) A regional assembly may make such statements or reports on any matter relating to or arising from the performance of its functions as the Minister, the Minister for Public Expenditure and Reform, or a constituent local authority may from time to time request.
(2) Where a statement or report is prepared by a regional assembly, the assembly shall -
(a) furnish a copy of the statement or report to each constituent local authority, to each public body or other body represented on a committee established under Articles 41 or 42 to which the statement or report relates, and to such other local authorities, public bodies, other bodies or persons as the regional assembly considers appropriate,
(b) publish the statement or report on the regional assembly’s website, and
(c) make copies of the statement or report conveniently available for inspection by any person or for purchase by any person at such price as may be determined by the regional assembly and give notice of the date on and from which the statement or report shall be so made available.