The New York City Department of Buildings (DOB) has published a Rule to provide details on how to benchmark to comply with Local Law 84 (LL84). To read the Benchmarking Rule, download Final Benchmarking Rule (in PDF). A public hearing occurred on March 21, 2011, at 10:30 am, at 280 Broadway Ave., 6th Floor. The public comment period is now closed. Benchmarking completed prior to issuance of the final rule but in accordance with the law will be deemed in compliance.