18E. —The Minister shall, by order, within 3 months of submitting the National Plan to the Government under section 18D(1)(a)(iii) and having regard to the National Plan—

(a) specify the date by which the Irish language shall become the working language in the offices, in a Gaeltacht Language Planning Area, of a public body or class of public bodies and different dates may be specified in respect of different Gaeltacht Language Planning Areas, and

(b) specify the date by which all services provided by a public body or class of public bodies in a Gaeltacht Language Planning Area (including such services provided by a public body or class of public bodies from outside the Gaeltacht Language Planning Area) shall be provided through the medium of the Irish language and different dates may be specified in respect of different Gaeltacht Language Planning Areas.]