Recognizing liability on ipso facto matters out of an agreemet

Sir, Kindly advise on the following: In a loan sanction letter/loan agreement letter it is written that- Repayment will commence in following manner in case of purchase/acquisition of built up house three months after the month in which the first disbursement is made. The question is; w.r.t a home loan the EMI is the scheduled repayments and it consists of two elements i.e interest and a portion of principal loan amount. Please confirm whether bank is entitled to levy monthly interest for the first three months as per this agreement. Is it ipso facto to be understood that bank is entitled to levy interest for that period even if it is written on the agreement? Is there any sense in saying that aforesaid period was moratorium period? How a moratorium period applies to a home loan meant to purchase a ready built house where loan sanctioned at one lumpsum? Can it be challenged in the court of law?