Any sole proprietor, partner, or joint venturer who has requested coverage under this title and who shall thereafter be injured or sustain an occupational disease, shall be entitled to the benefit of this title, as and under the same circumstances and subject to the same obligations as a worker: PROVIDED, That no such person or the beneficiaries thereof shall be entitled to benefits under this title unless the department has received notice in writing of such request on such forms as the department may provide prior to the date of the injury or occupational disease as the result of which claims are made: PROVIDED, That the department shall have the power to cancel the personal coverage of any such person if any required payments or reports have not been made.