Where the use of radio spectrum has been harmonised, access conditions and procedures have been agreed, and undertakings to which the radio spectrum shall be assigned have been selected in accordance with international agreements and Union rules, Member States shall grant the right of use for such radio spectrum in accordance therewith. Provided that all national conditions attached to the right to use the radio spectrum concerned have been satisfied in the case of a common selection procedure, Member States shall not impose any further conditions, additional criteria or procedures which would restrict, alter or delay the correct implementation of the common assignment of such radio spectrum.