A partnership or a limited liability company which is taxed as a partnership under the Internal Revenue Code and is subject to the provisions of section 5920 of this title shall pay an annual tax of $250.00 to the Commissioner of Taxes on or before the due date prescribed for the filing of the entity's federal return. The tax shall be submitted together with a form prescribed by the Commissioner. A limited liability company that does not receive partnership treatment under the Internal Revenue Code shall be taxed for state purposes in the same manner as taxed under the Internal Revenue Code. Partnerships whose activities are limited to the maintenance and management of their intangible investments and whose annual investment income does not exceed $5,000.00 and whose total assets are not in excess of $20,000.00 shall be exempt from the tax imposed by this section. (Added 1995, No. 169 (Adj. Sess.), § 24, eff. May 15, 1996; amended 1997, No. 50, § 23, eff. June 26, 1997; 1997, No. 71 (Adj. Sess.), § 27a(b), eff. March 11, 1998; 1997, No. 156 (Adj. Sess.), § 37a, eff. April 29, 1998.)