How California Health and Safety Code section 7100 ranks who controls final disposition, how the majority rule works, and why written wishes come first.
When someone dies, a family may not agree about what should happen to their remains. California law answers the question of who decides. Knowing the order can ease a hard conversation before it becomes a conflict.
Under Health & Safety Code § 7100.1, a person may direct in writing how their remains are to be handled. Those directions are to be faithfully carried out, as long as they are clear enough to avoid material ambiguity and arrangements have been made to pay for them so survivors are not obligated. Directions in a will are to be carried out right away, even before the will is admitted to probate. Wishes written down ahead of time carry real weight.
When it comes to who holds the right to control disposition, § 7100(a) sets this order:
Where children, siblings, or other relatives share the right, a majority decides. The statute also lets fewer than a majority act if they have made reasonable efforts to notify the others and are not aware of opposition from more than half of them. In practice, this means telling everyone in the group what is planned, in writing, before it happens.
For putting your own wishes in writing, see planning your own burial at sea.
This is general information, not legal advice. Confirm current rules with the cited source or an attorney.