You're talking about "severability" in US contract law. The rest of the contract was either stupid (regulating my usage of the non-existent golf course) or just

You're talking about "severability" in US contract law. The rest of the contract was either stupid (regulating my usage of the non-existent golf course) or just garden variety stuff (can't sublet, etc.). The same company also just dropped off an "updated" contract a few months later and told me that I had to review it and sign it or move out by the end of the month. I obviously just ignored this.