(a) An attorney shall not practice law in a jurisdiction in violation of the regulation of the legal profession in that jurisdiction, or assist another in doing so.

(b) An attorney who is not admitted to practice in this jurisdiction shall not:

(1) except as authorized by these Rules or other law, establish an office or other systematic and continuous presence in this jurisdiction for the practice of law; or

(2) hold out to the public or otherwise represent that the attorney is admitted to practice law in this jurisdiction.

(c) An attorney admitted in another United States jurisdiction, and not disbarred or suspended from practice in any jurisdiction, may provide legal services on a temporary basis in this jurisdiction that:

(1) are undertaken in association with an attorney who is admitted to practice in this jurisdiction and who actively participates in the matter;

(2) are in or reasonably related to a pending or potential proceeding before a tribunal in this or another jurisdiction, if the attorney, or a person the attorney is assisting, is authorized by law or order to appear in such proceeding or reasonably expects to be so authorized;

(3) are in or reasonably related to a pending or potential arbitration, mediation, or other alternative dispute resolution proceeding in this or another jurisdiction, if the services arise out of or are reasonably related to the attorney's practice in a jurisdiction in which the attorney is admitted to practice and are not services for which the forum requires pro hac vice admission; or

(4) are not within subsections (c)(2) or (c)(3) of this Rule and arise out of or are reasonably related to the attorney's practice in a jurisdiction in which the attorney is admitted to practice.

(d) An attorney admitted in another United States jurisdiction, and not disbarred or suspended from practice in any jurisdiction, may provide legal services in this jurisdiction that:

(1) are provided to the attorney's employer or its organizational affiliates and are not services for which the forum requires pro hac vice admission; or

(2) are services that the attorney is authorized to provide by federal law or other law of this jurisdiction.

(e)(1) In this section, “foreign attorney” means an attorney who (A) is not admitted to practice law in any United States jurisdiction, (B) is a member in good standing of a recognized legal profession in a country other than the United States and, as such, is authorized to practice law in that country, (C) is subject to effective regulation and discipline by a duly constituted professional body or a public authority of that country, and (D) has not been disbarred or suspended from the practice of law in any jurisdiction of the United States.

(2) A foreign attorney may not establish an office or other systematic and continuous presence in this State for the practice of law, or hold out to the public or otherwise represent that the attorney is admitted to practice law in this State. Any violation of this provision or any material misrepresentation regarding the requirements in subsection (e)(1) of this Rule by the foreign attorney will subject the foreign attorney to liability for the unauthorized practice of law.

(3) A foreign attorney, with respect to any matter, may (A) act as a consultant to a Maryland attorney on the law and practice in a country in which the foreign attorney is admitted to practice, including principles of international law recognized and enforced in that country and (B) in association with a Maryland attorney who actively participates in the matter, participate in discussions with a client of the Maryland attorney or with other persons involved with the matter, provided that the Maryland attorney shall remain fully responsible to the client for all advice and other conduct by the foreign attorney with respect to the matter.