In the case of a qualified manufacturer of steel as described in § 15-4-2405(a) which is:
(1) A proprietorship, partnership, or other business organization treated as a proprietorship or partnership for tax purposes, the amount of the credit determined under this subchapter for any taxable year shall be apportioned to each proprietor, partner, member, or other owner in proportion to the amount of income from the entity which the proprietor, partner, member, or other owner is required to include in gross income;
(2) A Subchapter S corporation, the amount of credit determined shall be apportioned to each Subchapter S corporation shareholder in proportion to the amount of income from the entity which the Subchapter S corporation shareholder is required to include as gross income; or
(3) An estate or trust: The amount of the credit determined for any taxable year shall be apportioned between the estate or trust and the beneficiaries on the basis of the income of the estate or trust allocable to each; and
(4) Any beneficiary to whom any amount has been apportioned under this subchapter shall be allowed, subject to the limitations contained in this subchapter, a credit under this subchapter for that amount.