§ 860-d. Extension of mass layoff period. A mass layoff of more than six months which, at its outset, was announced to be a mass layoff of six months or less shall be treated as an employment loss under this article unless:

1. the extension beyond six months is caused by business circumstances (including unforeseeable changes in price or cost) not reasonably foreseeable at the time of the initial mass layoff; and

2. notice is given at the time it becomes reasonably foreseeable that the extension beyond six months will be required.