California Code, Government Code - GOV § 66441

A statement by the engineer or surveyor responsible for the survey and final map is required.  His or her statement shall give the date of the survey, state that the survey and final map were made by him or her or under his or her direction, and that the survey is true and complete as shown.

The statement shall also state that all the monuments are of the character and occupy the positions indicated, or that they will be set in those positions on or before a specified later date.  The statement shall also state that the monuments are, or will be, sufficient to enable the survey to be retraced.