California Code of Civil Procedure Section 437c(d)
Code of Civil Procedure section 437c, subdivision (d) provides that declarations filed in conjunction with summary judgment motions "shall be made by any person on personal knowledge, shall set forth admissible evidence, and shall show affirmatively that the affiant is competent to testify to the matters stated . . . ."
"The requirement of this section is not that the declarant recite the conclusion that he can competently testify but that he allege facts showing his competence." (Roy Brothers Drilling Co. v. Jones (1981) 123 Cal.App.3d 175, 182.)
We review a court's decision to admit or exclude evidence under the abuse of discretion standard. (People v. Alvarez (1996) 14 Cal.4th 155, 201.)
This "'discretion is only abused where there is a clear showing [it] exceeded the bounds of reason, all of the circumstances being considered.'" (People ex rel. Lockyer v. Sun Pacific Farming Co. (2000) 77 Cal.App.4th 619, 640.)