Section 301(c)(1) of the Pennsylvania Workers' Compensation Act provides that there are two situations where an injury can be considered in the course of employment. The first is where an employee is actually engaged in the furtherance of the employer's business, whether on or off the premises. In the second situation, an employee who is engaged in work at the time of the injury can nonetheless be entitled to compensation where the employee: is on the premises under the control of the employer; is required by the nature of their employment to be on such premises; and sustains an injury or injuries due to a condition of the premises or operation of the business.