Except as provided in subsection (b) of this section, a foreign banking corporation may not have an office in this State for any purpose unless: The foreign banking corporation obtains from the Commissioner a permit for the office; or The office is authorized under: The Riegle–Neal Interstate Banking and Branching Efficiency Act of 1994 or other federal law; or Title 5, Subtitle 9 or Subtitle 10 of this article. A foreign banking corporation that maintains another license issued by the Commissioner is exempt from obtaining a permit under this section.