186. Nevertheless, the modification or regularization of rivers provided for in section 185 is, in Category I and Category IB-N lands, subject to the following rules:(a) the flow regime shall not be modified in such a way as to raise the water level of a river above the highest previously recorded water level of the river;
(b) for the purposes of establishing or maintaining, in Category I or Category IB-N lands, the services listed in section 126, 138 or 191.19, as the case may be, which are of direct benefit as contemplated in section 133 or 191.25, as the case may be, the water level of rivers may be raised above the highest recorded level;
(c) if shore facilities or other installations or rights connected therewith are affected by the change of water level, the Government and the bodies mentioned in section 185 are liable for damages to such facilities, installations or rights connected therewith.