Director General, Mauritius Revenue Authority (Appellant) v Central Water Authority (Respondent)

For VAT purposes, treating a transaction as a single supply does not make its ancillary elements disappear. They ordinarily share the principal supply’s tax treatment, but legislation may identify a concrete and specific aspect of the overall supply and assign it a different VAT status. This may include services that are necessary prerequisites to the principal supply and have no independent customer aim. Separate consideration for the identified aspect is unnecessary where consideration exists for the overall package. The amendment therefore treated meter rental and customer-specific connection works as exempt supplies, so input tax on those items was not creditable. General infrastructure works unrelated to a particular customer supply remained outside the restriction. The separate retrospectivity challenge was left undecided.

The Central Water Authority supplied water in Mauritius, providing meters and arranging connection works for customers. Ministerial regulations amended the Value Added Tax Act 1998 so that meter rental and infrastructure works were exempt for VAT purposes, with effect from 7 September 1998.

The Assessment Review Committee allowed the Authority’s claim for input-tax credit and stated a case for the Supreme Court of Mauritius, which upheld that view on 19 July 2011. The Revenue appealed to the Privy Council. The central questions were whether the meter and connection services were part of a single water supply, whether the Minister could exempt them separately, and whether the resulting input tax was creditable. The Authority also raised the retrospective operation of the regulations.

Appeal allowed. The Board determined that the Central Water Authority was not entitled to credit for input VAT incurred on meters and customer-specific connection works during the relevant periods.

1. The Board applied the single-supply principles in Card Protection Plan Ltd v Commissioners of Customs and Excise (Case C-349/96) [1999] 2 AC 601. Ancillary supplies do not disappear merely because they form part of one overall supply. They share the principal supply’s treatment, but remain identifiable for particular VAT purposes. Whether an element is ancillary depends on the transaction’s essential features and whether it is an end in itself or merely a means of better enjoying the principal service.
2. The European authorities, including European Commission v France (Case C-384/01) [2003] ECR I-4395, Talacre Beach Caravan Sales Ltd v Customs and Excise Commissioners (Case C-251/05) [2006] STC 1671, and Finanzamt Oschatz v Zweckverband zur Trinkwasserversorgung und Abwasserbeseitigung Torgau-Westelbien (Case C-442/05) [2009] STC 1, showed that a legislator may give a different VAT status to a concrete and specific aspect of a single overall supply. The Board saw no material difference between those principles and the Value Added Tax Act 1998.
3. Under section 4(1)(b), meter rental and necessary infrastructure were supplies of services. Section 4(5)(c) treated them as part of the water supply for classification purposes, but did not prevent their separate identification under the First Schedule. Their necessity as prerequisites to receiving water did not stop them being concrete and specific elements. Separate consideration was not required; consideration for the overall package could be apportioned under section 12.
4. The substantive vires challenge failed. Section 72 authorised amendment of the First Schedule, and the 1998 regulations could exempt meter rental and customer-specific infrastructure without being defeated by the single-supply analysis. Under section 21(2)(a), input tax on goods and services used to make an exempt supply was not allowable. General works on the Authority’s mains were different because they were general overheads not related to a supply to a particular customer.
5. The challenge to the retrospective effect of regulation 4 was not determined. It had not been explored below, the factual record was incomplete, and its practical significance appeared marginal. The Board invited written submissions on costs within 21 days.

1. Privy Council: in [2013] UKPC 4, allowed the Revenue’s appeal and held that the input VAT was not creditable.
2. Supreme Court of Mauritius: on 19 July 2011, upheld the Assessment Review Committee’s view.
3. Assessment Review Committee: on 26 June 2007, stated a case for the opinion of the Supreme Court after allowing the Authority’s claim.