From a California blog:

"What should be controversial in the proposed revisions to Title 24 is
the requirement for what is called a “programmable communicating
thermostat” or PCT. Every new home and every change to existing homes’
central heating and air conditioning systems will required to be
fitted with a PCT beginning next year following the issuance of the
revision. Each PCT will be fitted with a “non-removable ” FM receiver
that will allow the power authorities to increase your air
conditioning temperature setpoint or decrease your heater temperature
setpoint to any value they chose. During “price events” those changes
are limited to +/- four degrees F and you would be able to manually
override the changes. During “emergency events” the new setpoints can
be whatever the power authority desires and you would not be able to
alter them."

In other words, the temperature of your home will no longer be yours
and will be overridden by the state of California through its public
and private utility organizations.

All your thermostats are belong to us.