2009 California Water Code - Section 420 :: Article 3. Reporting

420.  The weather resources management project operator shall keep a
record of all operations conducted, showing the equipment, the
methods, the types, amounts, times, and places of seeding agents
employed, a statement as to the estimated effect of the operation in
relation to its intended purpose, and the name and address of each
person participating or assisting in the operation. A report on the
evaluation of project results shall be filed with the department
within one year of the termination of a project or, in the case of an
ongoing project, at least once every two years.