We have no hesitancy in holding that the act in question is not subject to successful challenge on the ground that it is a law “impairing the obligation of contracts” within the meaning of the constitutional provisions on the subject. Art. I, sec. 10, U. S. Const.; Art. I, sec. 17, N. O. Const. This is the only point raised by the appeal.
In the first place, the right of removal and substitution of trustees in deeds of trust existed at the time of the execution of the Bateman-Chicka-*61mauga-Prudential deed of trust. C. S., 2583; McAfee v. Green, 143 N. C., 411, 55 S. E., 828; Trust Co. v. Padgett, 194 N. C., 727, 140 S. E., 714.
True, tbe provisions of mortgages and deeds of trust are contractual. Mitchell v. Shuford, 200 N. C., 321; Brown v. Jennings, 188 N. C., 155, 124 S. E., 150; Eubanks v. Becton, 158 N. C., 230, 73 S. E., 1009. And tbe obligation of a contract, within tbe meaning of tbe constitutional prohibition against impairment, includes all tbe means and assurances available for tbe enforcement of tbe contract at tbe time of its execution. Green v. Asheville, 199 N. C., 516, 154 S. E., 852; Barnes v. Barnes, 53 N. C., 366; Jones v. Crittenden, 4 N. C., 55; 6 R. C. L., 324, et seq. But it is also true that tbe laws in force at tbe time of tbe execution of a contract enter into and become a part of tbe convention of tbe parties. Trust Co. v. Hudson, 200 N. C., 688; House v. Parker, 181 N. C., 40, 106 S. E., 137; Mfg. Co. v. Holladay, 178 N. C., 417, 100 S. E., 597.
As pertinent and illustrative of this principle may be instanced Clark v. Reyburn, 8 Wall., 322, where it was said that tbe remedy provided by statute for tbe foreclosure of a mortgage, in existence at tbe time of its execution, enters into and becomes a part of tbe contract of the parties, and any change by legislative action, which substantially and materially affects this remedy to tbe injury of tbe mortgagee, is a law “impairing tbe obligation of contracts,” within tbe meaning of tbe constitutional provision on tbe subject; and Brine v. Ins. Go'., 96 TJ. S., 627, where it was held that a statutory right of redemption, existent at tbe time of tbe making of a mortgage, enters into and becomes a part of its terms. See 6 R. C. L., 365, and cases there cited.
With tbe right of removal and substitution of trustees in deeds of trust given by statute at tbe time of tbe execution of tbe instrument in question, which entered into and became a part of tbe agreement of tbe parties, we see no valid objection to a procedural change in tbe method provided for tbe enforcement of this right, so long as tbe rights of tbe parties, and especially those of tbe cestui que trust, are not injuriously affected thereby. 6 R. C. L., 356. “No person can claim a vested right in any particular mode of procedure for tbe enforcement or defense of bis rights.” Martin v. Vanlaningham, 189 N. C., 656, 127 S. E., 695; Dunn v. Jones, 195 N. C., 354, 142 S. E., 320; Statesville v. Jenkins, 199 N. C., 159, 154 S. E., 15. Tbe 1931 act provides for registration, bearing, right of appeal, etc.
It is recognized that any unreasonable alteration in tbe remedies afforded by tbe lex loci contractus at tbe time of tbe making of a contract is prohibited by tbe contract clause of tbe Constitution. Green v. Biddle, 8 Wheat., 1. And a law which enlarges, abridges, or in any *62manner changes the intention of the parties, though professing only to regulate the remedy, necessarily impairs the obligation of the contract. S. v. Carew, 13 Rich. L. (S. C.), 498, 91 Am. Dec., 245. But a statute which facilitates the intention of the parties neither impairs the obligation of the contract, nor divests vested rights. Nat. Surety Co. v. Architectural Co., 226 U. S., 276; Lowe v. Harris, 112 N. C., 472, 17 S. E., 539.
The law on the subject is very clearly stated by Mr. Justice Swayne in Von Hoffman v. City of Quincy, 4 Wall., 535, as follows:
“It is also settled that the laws which subsist at the time and place of the making of a contract, and where it is to be performed, enter into and form a part of it, as if they were expressly referred to or incorporated in its terms. This principle embraces those which affect its validity, construction, discharge, and enforcement. . . . Nothing can be more material to the obligation than the means of enforcement. Without the remedy the contract may, indeed, in the sense of the law, be said not to exist, and its obligation to fall within the class of those moral and social duties which depend for their fulfilment wholly upon the will of the individual. The ideas of validity and remedy are inseparable, and both are parts of the obligation, which is guaranteed by the Constitution against invasion. The obligation of a contract 'is the law which binds the parties to perform their agreement.’ The prohibition has no reference to the degree of impairment. The largest and least are alike forbidden ... It is competent for the States to change the form of the remedy, or to modify it otherwise, as they may see fit, provided no substantial right secured by the contract is thereby impaired. No attempt has been made to fix definitely the line between alterations of the remedy, which are to be deemed legitimate, and those which, under the form of modifying the remedy, impair' substantial rights. Every case must be determined upon its own circumstances. Whenever the result last mentioned is produced the act is within the prohibition of the Constitution, and to that extent void.
“The obligation of a contract, in the constitutional sense, is the means provided by law by which it can be enforced — by which the parties can be obliged to perform it. Whatever legislation lessens the efficacy of these means impairs the obligation. If it tend to postpone or retard the enforcement of the contract, the obligation of the latter is to that extent weakened.” And see Louisiana v. New Orleans, 102 U. S., 203; Seibert v. Lewis, 122 U. S., 284; Hendrickson v. Apperson, 245 U. S., 106; Williams v. Suydam, 6 Wall., 723, 18 L. Ed., 967.
The result of the decisions, on the subject is, that a change in the statutory method of procedure for the enforcement or exercise of an *63existent right is not prohibited by any constitutional provision, unless the alteration or modification is so radical as to impair thembligation of contracts or to divest vested rights. 6 R. C. L., 356.
' The primary purpose of the act in question is, not to enlarge the substantive rights of the cestui que trust (though such rights are enumerated therein in greater detail), but to provide a more expeditious and economical way for the removal and substitution of trustees in deeds of trust and other instruments. We are of opinion that the act is valid as against the challenge leveled against it in the instant proceeding.
There is no provision in the Federal or State Constitution which prohibits the passage of retroactive or retrospective laws, as distinguished from those that are ex post facto, unless they impair the obligation of contracts or disturb vested rights. Ashley v. Brown, 198 N. C., 369, 151 S. E., 125; Stanback v. Bank, 197 N. C., 292, 148 S. E., 313.
Affirmed.