An Taisce is an independent non-governmental organisation and I have no detailed information regarding its membership.
In general terms it is a matter for non-governmental organisations to regulate their own affairs, without Government involvement. However, general provisions have been included in Section 10 of the Planning and Development (Strategic Infrastructure) Act 2006 for the prescription of additional requirements for environmental organisations which must be satisfied in order for them to make an appeal against a decision by a planning authority on applications for development involving environmental impact assessment. Any regulations made under that provision must be of a general nature and for the purposes of promoting transparency and accountability in the operation of the non-governmental organisations involved.