3. In the event of a negative decision, the public sector bodies shall communicate the grounds for refusal to the applicant on the basis of the relevant provisions of the access regime in that Member State or of the provisions transposing this Directive, in particular points (a) to (h) of Article 1(2) or Article 3. Where a negative decision is based on point (c) of Article 1(2), the public sector body shall include a reference to the natural or legal person who is the rightsholder, where known, or alternatively to the licensor from which the public sector body has obtained the relevant material. Libraries, including university libraries, museums and archives, shall not be required to include such a reference.