1) MOU can not be enforced as it does not include a consideration
2) As such the MOU is only an understanding and falls short of an Agreement that can be enforced in law.
3) And so you can not register the MOU.
4) In order to cover yourself it is advisable to include a clause regarding termination
As such an MOU is actually just a means for two parties to reach a decision. It is used to gauge the intention of the transacting parties before a deal is officially signed between them and doesn't grant either of them any rights. So, in some cases, it may make more sense to opt for a softer, non-legal document than a legally binding one.
Sometimes, situations warrant the use of a softer document that only captures the intention of the parties till a more definitive agreement can be drawn up. So, an MoU is a good choice.MoUs are very handy even in matters where the final deal would depend on the fulfilling of certain conditions.
You can form and register a Tenants' Association and inform the landlord developer about the same.