(a) The department shall as often as necessary provide each railroad company a questionnaire designed to elicit all information concerning the railroad.
(b) A railroad company receiving a questionnaire under Subsection (a) shall properly fill out the questionnaire and answer each question fully and correctly. A railroad company that is unable to answer a question shall give satisfactory reason for the inability to answer.
(c) A railroad company shall return the completed questionnaire, sworn to by the proper officer of the company, to the department not later than the 30th day after the date the company received the questionnaire.