2. Section 101 of the 1972 Local Government Act provides that a local authority may arrange for the discharge of any of their functions by (inter alia) a committee, a sub-committee or an officer of the authority. Failure to arrange for the discharge of functions by delegation does not generally give rise to an implied delegation at law: specific delegation to officers is required. Once delegated to an officer, however, there is a generally implied discretion to that officer to decide upon further delegation (but with such decisions being open to challenge for abuse of discretion). 3. The Town & Country Planning Act 1990 (“the principal Act”) was first amended by the Planning & Compensation Act 1991 and has since undergone further amendment in the form of the Planning & Compulsory Purchase Act 2004. 4. The powers now available to local planning authorities in the performance of their enforcement functions may be summarised as follows: Town & Country Planning Act 1990 (as amended) (“the principal Act”) 1. Service of notices requiring information as to interests in land – section 330