Your state probably has a building code that impacts design and equipment choices related to energy use, but upcoming changes to a national energy code may soon change those rules. Under a 1992 federal law, state codes need to be updated to meet a tougher national standard. Since that new code covers renovations (not just new buildings), the design of future energy upgrades in your building(s) may be affected.
When EPAct was passed, several states (such as New York and California) already had codes that were more stringent than 90.1-1989, and many energy professionals were unimpressed by that standard. It was, however, a good beginning to the process. It focused attention on energy efficiency in parts of the U.S. where little concern had been paid to it. Coverage of 90.1-1989 was, however, limited (like many building codes) to new construction, e.g., new buildings or major additions. As a result, it had no impact on the vast majority of energy upgrades being done in existing buildings.