This regulation does not apply to electric supply service provided by a utility prior to the service periods specified in §§B and C of this regulation. Type I—Small Commercial Customer. A utility shall provide Type I SOS to a customer for the following specified time periods: Baltimore Gas and Electric Company from July 1, 2004 through May 31, 2008; Delmarva Power & Light Company from June 1, 2004 through May 31, 2008; Potomac Electric Power Company from July 1, 2004 through May 31, 2008; and The Potomac Edison Company doing business as (d/b/a) Allegheny Power from January 1, 2005 through December 31, 2008. A utility shall offer Type I SOS as ordered by the Commission to all small commercial customer classes. Type II—Commercial Customer. A utility shall offer Type II SOS to a commercial customer as defined under COMAR 20.52.01.02B(11). A utility shall provide Type II SOS to customers for the following specified time periods: Baltimore Gas and Electric Company from July 1, 2004 through May 31, 2006; Delmarva Power & Light Company from June 1, 2004 through May 31, 2006; Potomac Electric Power Company from July 1, 2004 through May 31, 2006; and The Potomac Edison Company doing business as (d/b/a) Allegheny Power from January 1, 2005 through December 31, 2006. Extension of SOS. The Commission may extend a utility obligation to provide SOS under Public Utilities Article, §7-510(c)(3), Annotated Code of Maryland.