5 CFR § 2425.5 - Content and format of opposition.
If you choose to file an opposition, then you may file your opposition on an optional form that is available on the FLRA's Web site at www.flra.gov, or in any other format that is consistent with this section. You meet this requirement if you file your opposition electronically through use of the FLRA's eFiling system on that Web site. Your failure to use, or properly fill out, an Authority-provided form will not, by itself, provide a basis for dismissing your opposition. If you choose to file an opposition, and you dispute any assertions that have been made in the exceptions, then you should address those assertions—including any assertions that any evidence, factual assertions, arguments (including affirmative defenses), requested remedies, or challenges to an awarded remedy were raised before the arbitrator. If the excepting party has requested an expedited, abbreviated decision under § 2425.7 of this part, then you should state whether you support or oppose such a decision and provide supporting arguments. You must provide copies of any documents upon which you rely (which you may upload as attachments if you file your opposition electronically through use of the FLRA's eFiling system), unless the Authority can easily access those documents (as discussed in § 2425.4(b) of this part) or the excepting party provided them with its exceptions.