"'If before having repaid to the council the total amount of principal and interest due under this Agreement the Borrower shall ... (2) cease to be employed by the Council ..... the total amount of principal and interest then outstanding under this Agreement shall forthwith become due and payable to the Council and they shall in addition to the exercise of all other legal or equitable rights and remedies be entitled to deduct such balance from any sum which may then be or become due to [Mr Fashola] from council whether by way of accrued salary or refund of contributions or otherwise and the execution of these presents by [Mr Fashola] shall constitute sufficient authority for such deduction'."
"An employer shall not make a deduction from wages of a worker employed by him unless— (b) the worker has previously signified in writing his agreement or consent to the making of the deduction."