An easement for conservation is valid even though:
1. It is not appurtenant to an interest in real property;
2. It can be or has been assigned to another holder;
3. It is not of a character that has been recognized traditionally at common law;
4. It imposes a negative burden;
5. It imposes affirmative obligations upon the owner of an interest in the burdened property or upon the holder;
6. The benefit does not touch or concern real property; or
7. There is no privity of estate or of contract.