I submit the following proposal.
Proposal: Resurrect Rule 2140 (AI=3) Create a rule entitled "Power Controls Mutability" with Power 3 reading as follows: No entity with power below the power of this rule can (a) cause an entity to have power greater than its own. (b) adjust the power of an instrument with power greater than its own. (c) modify any other substantive aspect of an instrument with power greater than its own. A "substantive" aspect of an instrument is any aspect that affects the instrument's operation. -- Elysion