DMP templates and guidance for NSF follow the following hierarchy:
Use specific Data Management directions in the solicitation (f it exists, if not….
Check for specific Division requirements (if they exist, if not….
Check for specific Directorate requirements (if the exist, if not….
Use the NSF Generic template and guidance
In the case you ask about, the “Environmental Engineering” program, first check the solicitation. If there isn’t anything specific about a Data Management plan, then use the DMP Guidance for the Engineering Directorate.
Rationale: This program is in the “Chemical, Bioengineering, Environmental, and Transport Systems" Division which doesn’t have specific guidance. The Directorate for this Division is Engineering and it does have specific guidance. So use that.