Contracting entities shall notify to the Commission, if so requested, the following information regarding the application of Article 29(2) and (3) and Article 30:

(a) the names of the undertakings or joint ventures concerned,

(b) the nature and value of the contracts involved,

(c) proof deemed necessary by the Commission that the relationship between the undertaking or joint venture to which the contracts are awarded and the contracting entity complies with the requirements of Articles 29 or 30.