If the project does not already have submeters, there can be a number of difficulties that prevent teams from pursuing this credit. 

Integrating submeters in order to isolate end-use energy consumption can be difficult in an existing building where the power supply to various end-uses does not come from a single point or electrical panel. In such cases, isolating and submetering loads can be physically impossible without major overhaul of building circuitry. 
The cost of installing submetering equipment can be cost-prohibitive. For example, an Energy Star study of submetering at colleges and universities estimated the installed cost for a single electricity submeter could range between $5,000 to $7,500. 

Evaluate your situation for any major obstacles or opportunities. There are few rules that are consistent across most buildings.