Cal. Code Regs. tit. 23 § 844
An extension of time within which to complete an application, to commence or complete construction work or apply water to full beneficial use will be granted only upon such conditions as the board determines to be in the public interest and upon a showing to the board's satisfaction that due diligence has been exercised, that failure to comply with previous time requirements has been occasioned by obstacles which could not reasonably be avoided, and that satisfactory progress will be made if an extension of time is granted. Lack of finances, occupation with other work, physical disability, and other conditions incident to the person and not to the enterprise will not generally be accepted as good cause for delay. The board may, in its discretion, require a hearing upon notice to the permittee and such other parties as the board may prescribe.
Cal. Code Regs. Tit. 23, § 844
Note: Authority cited: Section 1058, Water Code. Reference: Section 2, Article X, California Constitution; Sections 100, 104, 105, 275, 1250, 1253, 1255, 1257, 1394, 1395, 1396, 1397, 1398, 1410, 1546, 1675, Water Code; Sections 21000, 21065 and 21081, Public Resources Code; Johnson Rancho County Water District v. State Water Rights Board, 235 Cal.App.2d 863, 45 Cal.Rptr. 589 (1965); and National Audubon Society v. Superior Court of Alpine County, 33 Cal.3d 419, 189 Cal.Rptr. 345, 658 P.2d 709 (1983).