49 CFR 192, 192.801 A covered task is identified by the operator as a task that: a. All of those listed below b. Is performed on a pipeline facility c. Is an operations or maintenance task d. Is performed as a requirement of 49 CFR 192.801 e. Affects the operation or integrity of the pipeline

According to 49 CFR 192.801(b), a covered task is an activity, identified by the operator, that:

1. Is performed on a pipeline facility.
2. Is an operations or maintenance task.
3. Is performed as a requirement of 49 CFR Part 192.
4. Affects the operation or integrity of the pipeline.

Options b, c, d, and e are all criteria that define a covered task. Therefore, a covered task is identified by the operator as a task that meets all these conditions.

The final answer is $\boxed{\text{a. All of those listed below}}$