1. When a workman contracts any disease specified in Part B, while in service for a continuous period of 6 months under one employer. (Period of service under any other employer in the same kind of employment shall not be included),
2. When a workman contracts any disease specified in Part C, while he has been in continuous service for a specified period, whether under one or more employers. (Proportionate compensation is payable by all the employers, if the workman had been in service under more than one employer).

If an employee has after the cessation of that service contracted any disease specified in the said Part B or Part C, as an occupational disease peculiar to the employment and that such disease arose out of the employment, the contracting of the disease shall be deemed to be an injury by accident within the meaning of the Act.