Scope of amendment
Basic rule: an amendment is allowed within the subject matter of the specification or drawings originally attached to the application. In other words, new matter cannot be added by an amendment.

Examples:
(1) Since the Abstract is not part of the specification or drawings, it does not belong to the originally attached specification or drawings on which a determination regarding the addition or non-addition of a new matter is based.
(2) When an amendment to complete an incomplete invention is made, the amendment is considered as an addition of new matter.
(3) When informalities or unclear statements are corrected, an amendment sufficiently considered not to depart from the subject matter of the originally attached specification or drawings is not an addition of a new matter.
(4) When the correct statement from among at least two conflicting statements in the specification or drawings is obvious to one of ordinary skill in the art in view of the subject matter of the originally attached specification or drawings, an amendment made to match the wrong statement with the right statement is not an addition of new matter.
(5) When an amendment to the Detailed Description of the Invention according to the subject matter described in the drawings or claims is obvious to one of ordinary skill in the art, the amendment is not an addition of new matter.
(6) When an amendment to change a numerical range, an amendment to change a component of the invention from a generic component to a species, an amendment to the drawings, an amendment to add an embodiment, and an amendment to add or change objectives or effects of the invention are not obvious from the subject matter of the specification or drawings originally attached to the application, these amendments correspond to addition of new matter.
Scope of amendment