20. At a European election the returning officer shall, during the usual office hours and at such place or places as are named in the notice of election, on each week day during the period beginning on the publication of that notice and ending at F68[the latest time for receiving nominations specified in rule 10(3)], provide —

(a) the form of nomination paper,

(b) forms for use as replacement candidates lists, and

(c) forms of statutory declaration referred to in rules 6 and 19(2) ,

and the returning officer shall supply such a paper or forms free of charge to any person applying therefor, but the use at an election of a paper or form supplied by the returning officer pursuant to this rule shall not be obligatory: provided that the document so used is in the form prescribed under rule 5, 6, 18 or 19(2) as may be appropriate.