California
Title 8 §1509(e) · §8406(e) underground
At least every 10 working days for construction, and at least weekly for underground work.
Section 1509(e) orders the meeting and sets no period of its own. The one-year period comes from the injury and illness prevention programme rule, which is a different section, so the app names that one on the notice.
Retention
1 year, set by §3203(b)(2)







