(a) Except with respect to that qualified property referred to in subparagraph (iv) of this paragraph (a building or a structural component of a building), with respect to qualified property which is 5-year property, 10-year property and 15-year real property (as defined in section 168[c][2] of the Internal Revenue Code), and which is disposed of or ceases to be in qualified use prior to the end of 60 months, the difference between the investment credit taken and the investment credit allowed for actual use must be added back to the ordinary tax otherwise due in the year of disposition or disqualification.

(b) The amount of investment credit to be added back pursuant to clause ( a ) of this subparagraph is computed as follows:

(1) divide the total number of months of qualified use of the property by 60;

(2) multiply the amount computed in subclause ( 1 ) of this clause by the amount of the investment credit claimed on the property to ascertain the investment credit allowed for actual use;

(3) subtract the investment credit allowed for actual use from the investment credit claimed on the property to determine the amount of investment credit to be added back; and

(4) add the amount of investment credit to be added back to the ordinary tax due for the year the property was disposed of or ceased to qualify.

(c) An add-back, pursuant to clause ( a ) of this subparagraph, of the investment credit taken will not be required if the property is disposed of or ceases to be in qualified use after such property has been in qualified use for more than 60 months.

(d) condemnation of the property;

(e) a gift of the property;

(f) the contribution of the property to a partnership or corporation, unless a substantial interest in the ownership of the retail enterprise is retained by the transferor;

(g) loss of the property due to a fire, storm or other casualty;

(h) a legal dissolution of the taxpayer; and