(a) Investment company. For purposes of this section, the term ‘‘investment company’’ includes the following:

1. (1) A regulated investment company, as defined in 26 U.S.C.A. § 851 (relating to the definition of regulated investment company).
2. (2) An incorporated or unincorporated enterprise registered with the Securities and Exchange Commission under the Investment Company Act of 1940 (15 U.S.C.A. § § 80a-1—80b-21).
3. (3) An investment company which has no or only limited powers under its governing instruments to vary its investments.

(d) Accumulated income account. Each investment company shall establish and maintain an accumulated income account and shall cumulatively adjust the account at the close of each taxable year beginning on or after January 1, 1993, as follows:

1. (1) By increasing the account for the sum of the following:

   1. (i) The amount of the investment company’s current earnings and profits determined without taking into account the following:

      1. (A) The investment company’s capital gain net income, as defined in 26 U.S.C.A. § 1222(9) (relating to other terms relating to capital gains and losses), if any.
      2. (B) Items of interest derived by the investment company from an obligation that is statutorily free from taxation by the Commonwealth.
      3. (C) Items of Pennsylvania exempt-interest dividend paid or credited to the investment company as a shareholder by another investment company.
      4. (D) A distributive share of an item described in clause (B) or (C).
      5. (E) That proportion of an amount otherwise allowable as a deduction in computing the earnings and profits which the total of the items described in clauses (B)—(D) bears to the sum of the total and other gross income of the investment company—exclusive of its capital gain net income.
   2. (ii) The amount of the investment company’s capital gain net income.
   3. (iii) The aggregate amount, if any, of Pennsylvania exempt-interest dividend distributions paid or credited to shareholders for the immediately preceding taxable year.
2. (2) By reducing, but not below zero, the account for the aggregate amount, if any, of distributions paid or credited out of earnings and profits for the immediately preceding taxable year.

(e) Special rule.

1. (1) For purposes of subsection (d), the amount of an investment company’s accumulated income account as of the beginning of its 1993 taxable year, the aggregate amount of Pennsylvania exempt-interest dividend distributions paid or credited to shareholders for the 1992 taxable year, and the aggregate amount of distributions paid or credited out of earnings and profits for the 1992 taxable year shall be deemed to be zero, if, at the close of its 1992 taxable year, one of the following applies:

   1. (i) The investment company was unincorporated and had no power under its governing instruments to vary its investments except to eliminate unsafe investments and investments not consistent with the preservation of the capital or tax status of the investments of the fund, honor redemption orders, meet anticipated redemption requirements, negate gains from discount purchases, maintain a constant net asset value per unit under, and in compliance with, an order or rule of the United States Securities and Exchange Commission, or defray normal administrative expenses.
   2. (ii) The investment company was a partnership.
   3. (iii) The investment company had no undistributed earnings and profits.
2. (2) Otherwise, the amount of an investment company’s accumulated income account as of the beginning of its 1993 taxable year shall be the amount that would have been standing to the account at the close of the investment company’s 1992 taxable year had the investment company always maintained such an account in accordance with this section.