The Borrower may not repay the loan early unless expressly stated in the agreement. The repayment may be: (a) in whole or in part, (b) in whole, (c) in part.
I is stated in the agreement whether notice of early repayment shall be necessary. For intra-group loans, you should assess whether notice of early repayment is required by group treasury function, and if so what formalities are appropriate (in writing, notice period, etc).