No , the assignment to summarize section 202 of NEPA does not immediately suggest Administrative Law. Administrative law is a government agency's regulations.
Regulations indicate how to be in compliance with a law that has been passed.
It is difficult to know when you are dealing with administrative law. Administrative law is closely related to Statutory law. Best advice before deciding what you need is administrative law, determine if what you are looking for fits the description of when to use statuory law. Rule out the other two types of law, then think administrative law.