(a) A lawyer who is not admitted to practice in this State may provide legal services on a temporary basis in this State provided the following requirements are met.

1. (1) The lawyer is admitted or authorized to practice law in a state or territory of the United States or in the District of Columbia, or is a member of a recognized legal profession in a non-United States jurisdiction, the members of which are admitted or authorized to practice as attorneys or counselors at law or the equivalent and are subject to effective regulation and discipline by a duly constituted professional body or a public authority; and
2. (2) the lawyer is in good standing in every jurisdiction where admitted or authorized to practice; and

3. (3) the temporary legal services provided by the lawyer could be provided in a jurisdiction where the lawyer is admitted or authorized to practice and may generally be provided by a lawyer admitted to practice in this State, and such temporary legal services:

   1. (i) are undertaken in association with a lawyer admitted to practice in this State who actively participates in, and assumes joint responsibility for, the matter; or
   2. (ii) are in or reasonably related to a pending or potential proceeding before a tribunal in this or another jurisdiction, if the lawyer or a person the lawyer is assisting is authorized by law or order to appear in such proceeding or reasonably expects to be so authorized; or
   3. (iii) are in or reasonably related to a pending or potential arbitration, mediation or other alternative dispute resolution proceeding held or to be held in this or another jurisdiction, if the services are not services for which the forum requires pro hac vice admission; or
   4. (iv) are not within subparagraph (ii) or (iii) of this paragraph and arise out of or are reasonably related to the lawyer's practice in a jurisdiction in which the lawyer is admitted or authorized to practice.