214. Natural persons who, on 31 March 2015, are members of an institution that is a legal person under section 139 of the Act respecting health services and social services (chapter S-4.2) may continue to exercise the powers conferred on them by the Act on that date with regard to the immovables that are owned by such an institution on that date. The new institution must keep an up-to-date list of these persons for each of the legal persons so designated of which it is composed. This section does not apply to grouped institutions and their members.