(1) For a provisional specification, an amendment of the provisional specification is not allowable if, as a result of the amendment, the specification would disclose matter that extends beyond that disclosed in the following documents taken together:
(a) the provisional specification as filed;
(b) an abstract that was filed with the provisional specification;
(c) a missing part of a provisional specification that was incorporated into the specification in accordance with regulation 3.5A.
(2) An amendment of an abstract is not allowable.
Note: An abstract may be substituted under regulation 3.4.