If no such notice is given, the irrigation of the second crop shall be treated as unauthorised.

Water rate leviable when land intended to be irrigated by canal water is irrigated partly by well water.— If a portion of any land for the irrigation of which supply of canal water has been sanctioned is irrigated by well water for a part of the season owing to a deficiency in the supply of canal water and the applicant notifies the fact in writing to the Canal-Officer within eight days from the date on which he began taking well water, enquiry shall be made by the Canal-Officer as to whether the use of well water was necessary and if it be shown to the satisfaction of the Canal-Officer that the use of well water was necessary the rate chargeable on the portion irrigated by well water may, at the discretion of the Canal-Officer, be reduced to an amount which shall not be less than half the rate otherwise payable.