Which regulation identifies aliens allowed to work incident to status?

The correct selection pertains to the regulation that specifically outlines the categories of aliens permitted to work incident to their immigration status. The regulation at 8 C.F.R. § 274a.12(a) directly delineates the circumstances under which certain noncitizens may engage in employment without needing additional work authorization.

This regulation encompasses a variety of statuses, including but not limited to individuals with pending applications for certain immigration benefits or those whose statuses allow for employment in the U.S. This provision is important for noncitizens who may not have formal work permits, yet their immigration status grants them the right to work.

In contrast, alternative choices reference different legal sections or regulations. For instance, the other options either relate to broader definitions and classifications within immigration law rather than specifically addressing employment rights directly tied to an alien's status. This is crucial for understanding the complexities of work eligibility in the context of immigration, as not all regulations define work incident to status in the same manner.