Commonwealth Consolidated Regulations Commonwealth Consolidated RegulationsWhere a petition claims a seat for a person who has not been returned as a Member or Senator and a respondent wishes to contend that the person for whom the seat is claimed was not duly elected for some reason other than that the person did not have the requisite majority of valid votes, that respondent shall, within 7 days after filing a notice of appearance, or within such further time as the Court or a Justice allows, file and serve on the petitioner a statement of the grounds on which that person intends to rely setting out those grounds in the same manner in which facts relied on to invalidate an election or return are to be set out in a petition.