17. The following provisions shall apply in relation to the nomination of replacement candidates at a European election —

(a) the number of replacement candidates to be so nominated shall not —

(i) in the case of replacement candidates so nominated by a registered political party, exceed by more than F62[six] the number of candidates of that party standing validly nominated at the latest time for withdrawal of candidature under rule 15, and

(ii) in the case of replacement candidates so nominated by a non-party candidate, exceed F62[four],

(b) a person shall not be nominated as a replacement candidate unless that person is eligible under this Act for election to the Parliament,

(c) the replacement candidates so nominated as regards a particular constituency shall be nominated by each of their names being entered on a list (in this Act referred to as the “replacement candidates list”) and in nominating replacement candidates as regards a particular constituency, the registered political party or, as may be appropriate, the non-party candidate concerned, shall, subject to rule 19(4)(a), use a single such list.