R21:36.

He will not accept work in the geographic area in which he practices or intends to practice at a salary or fee below that recognized as a basic minimum in that area.

[See Codes 9., III.6. ]

Code is relevant when:

Engineer accepts engineering work
AND
The engineering work is in the geographic area in which he practices or intends to practice

Code is violated when:

The fee or salary for the engineering work is below that recognized as the basic minimum in that area

Code is not violated when:

The fee or salary for the engineering work is not below that recognized as the basic minimum in that area