SQL & PL/SQL

In the WHERE clause of a procedure:

AND  TO_DATE(loc.LAST_UPDATE_DATE,'DD-MM-YYYY') between TO_DATE(from_date,'DD-MM-YYYY') and TO_DATE(sysdate,'DD-MM-YYYY');

This gives me an error as:

ORA-01843: not a valid month

To use this i need to alter the session everytime I try to run the procedure.

alter session set nls_date_format = 'DD-MM-YYYY';

Is there any other way where i can run the procedure without passing the alter command every time I run the procedure?