(37)In particular, the Commission should be empowered to amend the list of materials restricted or prohibited for use as feed, to authorise feed intended for particular nutritional purposes, to establish a list of labelling categories of feed materials for non-food producing animals except fur animals, to adopt amendments to the Catalogue setting the maximum content of chemical impurities or levels of botanical purity or the levels of moisture content or particulars replacing the compulsory declaration, to adapt the Annexes in light of scientific and technological developments and to adopt transitional measures. Since those measures are of general scope and are designed to amend non-essential elements of this Regulation, inter alia, by supplementing it with new non-essential elements, they must be adopted in accordance with the regulatory procedure with scrutiny provided for in Article 5a of Decision 1999/468/EC.