98eef080_r_Climate_and_Energy_Solutions__Expansion
[Policy] Energy Efficiency Resource Standard (potentially tradable) [Innovation] Can be limited - if standard is met and there is no ongoing incentive to invest in additional energy efficiency. (Possible through frequent revision of the policy requirements.) [Compliance Cost Certainty] Minimal - can be difficult to know costs of meeting an energy efficiency quota. [Environmental Certainty] Some - an energy efficiency standard (or energy efficiency target) behaves similarly to a performance standard. [Linkability] Limited – programs, however, can be designed to trade energy efficiency credits. [Revenue Recycling] No [Expansion] 
Minimal - an energy efficiency resource standard could be expanded to encompass heating fuels as well.
Market Mechanisms: Understanding the Options | Center for Climate and Energy Solutions
Expansion