After compensation has been paid as provided in § 65.2-503, the employee may, within one year from the date compensation was last due under this section, file an application for compensation for incapacity to work, subject to the provisions of §§ 65.2-500 and 65.2-502. Such application shall be considered and determined as of the date incapacity for work actually begins or as of the date ninety days prior to the date of filing, whichever is later.