10. Subject to regulation 11, a complaint to a local authority may be made about the exercise of its social services functions including—
(a)the discharge by a local authority of any of its social services functions or a failure to discharge any of those functions;
(b)the provision of services by another person or body in accordance with arrangements made by the local authority in the discharge of those functions;
(c)the provision of services by the local authority in pursuance of arrangements made by that local authority under section 33 of the National Health Service (Wales) Act 2006 in relation to the functions of an NHS body (within the meaning of that section).