That was my understanding. We were there FIRST! planted our flag and established ownership. We also launched several Apollo missions afterwards, have equipment on the moon sending data.
Anyone else sending stuff to the moon should have to ask permission, pay rent, etc..
And if they say ‘what can you do about it”, we can simply build a big gun and put some lead into any stuff they try put on the moon without paying rent.
Too bad they never left a big bullseye target on the moon for target practice the last time we were there.