283. Where at a particular time there has been an increase or decrease in the relation between the use made by a taxpayer of a property for gaining income and the use made by him of the property for some other purpose, the taxpayer is deemed to have disposed of a property at that time for proceeds equal to the proportion of the fair market value of the property at that time that the amount of the increase or decrease in the use regularly made by the taxpayer of the property for such other purpose is of the whole use made of the property and to have reacquired the property immediately thereafter at a cost equal to those proceeds.
1972, c. 23, s. 261; 1993, c. 16, s. 116.