system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how can a sitting US president create "permanent" legislation?

It seems the only good news coming out of DC as of late has been a series of actions in relation to environmental protection, such as the setting aside of marine preserves and the banning of offshore drilling in many areas. 

In all of these circumstances, it is said that these ocean preserves are to be "permanently" off-limits to fishing and mining.  Likewise, the bans on offshore drilling are supposed to be "permanent."

How can they be "permanent" bans?  What is preventing the next president from just going in and reversing those permanent bans with the stroke of a pen?

Is it just another "norm" that subsequent presidents respect such legislation? Or are they required to?

I guess my questions is: how can a temporary head of state enact a law that is permanent and untouchable?
gpt
They are permanent in the sense that if left as-is, they have not expiration date. They can still be modified by congressional action.

From what I've read on the subject, another sitting president cannot undo the action because it is based on powers deligated to the President by law, and those deligated powers only provide for establishing these regions, not removing them.