A party to a contract may agree to comply with reasonable and necessary regulations that will be promulgated by the other party to the contract where the regulations to be added do not offend the contract principles discussed above. Such agreements are common in long-term contracts, especially where living accommodations are involved. In contracts with educational institutions, for example, a student often agrees to abide by all school regulations in existence and to be adopted. See, e.g., Mahavongsanan v. Hall, 529 F.2d 448 (5th Cir. 1976). The critical factor in determining whether such provisions are valid is whether an ascertainable standard for the promulgation of the new regulations is set forth in the principal agreement or can be inferred therefrom. See Buttny v. Smiley, 281 F. Sup. 280
(D. Colo. 1968); Sanders v. Louisiana *Page 520
State Board of Education, 281 F. Sup. 747 (W.D. La. 1968). That standard, if sufficiently articulated, will provide a substitute for a present knowledge of and assent to the subsequently adopted provisions.3 Indeed, the lease executed by the parties before us contains a general standard governing the regulations to be promulgated.4
But the lease also contains an express provision applicable to a termination for "good cause." Any regulation promulgated by the housing authority that modifies or contradicts this express provision of the lease is not enforceable under established rules of contract law. The bypass regulation is in direct conflict with the termination procedures in the lease, and, hence, cannot become a part of the lease under the theory of incorporation by reference.