Excepting one, the questions presented by this appeal are the same as those disposed of adversely to the contention of appellants in Irrigation Co. v. Water S. & S. Co., 29 Colo. 469; Fluke v. Ford, 35 Colo. 112; New Cache la Poudre Irrigating Co. v. Arthur Irrigation Co., ante, page 530.
Counsel for appellants contend that, because a change in the point of diversion of the priorities belonging- to them was perfected prior to the date when the act of 1899 and the act of 1903, on the same subject (Sess. Laws 1899, p..235, and Sess. Laws 1903, p. 278), took effect, that appellants are not required *535to comply witli the provisions thereof in order to maintain an action, the'purpose of which is to compel the officials charged with the duty of distributing water to recognize their right to divert water represented by these priorities at the respective points to which the same have been changed, because of the constitutional inhibition against ex post facto laws. The fact that a change was made in the point of diversion prior to the date when the acts of 1899 and 1903 took effect, did not render the right to such change a vested One. Prior to these acts, there was no statute on the subject, and, while the courts have recognized that the owner of a priority could change the point of diversion, it was always with the limitation that such chánge did not injuriously affect the rights of others. The acts in question have not changed the law in this respect, but merely require that a party desiring to change the point of diversion must follow a prescribed procedure, in order to obtain a decree which will permit him to make such change, and bind others taking water from the same source, and which officials charged with the duty of distributing water can be required to obey. These laws are merely remedial. They, only prescribe a procedure to be followed, by which the right to make a change in the point of diversion may be judicially settled and determined. They deprive no one of a vested right to such change, because they require a judicial ascertainment of such right, and are no more objectionable upon constitutional grounds than the irrigation statutes, which required, when adjudication proceedings were commenced, that all parties should come in and have their rights determined, by which there would be embodied in a permanent form the evidence of rights previously acquired. Until determined in some appropriate proceeding, the question of whether or not a change in the point of diversion *536injuriously affects others is left open for determination at the instance of any one claiming to be injuriously affected by such change. Lapse of time, and all other questions which a party making such change could rely upon in order to establish his right thereto could be invoked, but he cannot have these questions determined in the absence of parties whose rights would be affected by such change. The staff lites in question are not designed to divest, and do not have the effect of divesting, any one of a right to such change, whether made before' or after the law took effect, but are only intended to have such rights determined in a way which shall bind all parties affected by the change, and thus have evidenced in the form of a decree the right of a claimant to a change in the point of diversion, whether exercised before the law took effect, or to be enjoyed in the future.
The judgment of the district court is affirmed, without prejudice to appellants to maintain the statutory proceéding contemplated by the laws of 1899’ and 1903, supra.
Decision en banc. Judgment affirmed.