(1) No person shall throw, empty or tum into any sewer communicating with sewer belonging to the Board,-
(a) solid waste or any matter likely to injure the sewer or to interfere with the free flow of its contents or to affect prejudicially the treatment and disposal of its contents;
(b) any chemical refuse, industrial effluent or waste steam, or any liquid at temperature higher than forty five degree centigrade, or any liquid which is dangerous or the cause of a nuisance, or is prejudicial to health;
(c) any industrial effluent except with the express permission of the Board after such treatment as may be required by the Board.
(d) any dangerous petroleum or any explosive matter.
(2) In this section, the expression "dangerous petroleum" has the same meaning as in the Petroleum Act, 1934.
75. No person shall,-
(a) willfully obstruct any member of the Board or any person acting under the Board in the performance of his duties;
(b) willfully or negligently break, injure or tamper in any manner with any installation, pipe, fitting or apparatus belonging to the Board;
(c) willfully or negligently obstruct or hinder the flow of or flush, draw off or divert the flow of water or sewerage in any water course, pipe sewer;
(d) do any act likely to foui or pollute the water in any water works or sewer.