37 CFR § 41.204 - Notice of basis for relief.
(a) Priority statement.
(1) A party may not submit evidence of its priority in addition to its accorded benefit unless it files a statement setting forth all bases on which the party intends to establish its entitlement to judgment on priority.
(2) The priority statement must:
(i) State the date and location of the party's earliest corroborated conception,
(ii) State the date and location of the party's earliest corroborated actual reduction to practice,
(iii) State the earliest corroborated date on which the party's diligence began, and
(iv) Provide a copy of the earliest document upon which the party will rely to show conception.
(b) Other substantive motions. The Board may require a party to list the motions it intends to file, including sufficient detail to place the Board and the opponent on notice of the precise relief sought.
(c) Filing and service. The Board will set the times for filing and serving statements required under this section.