It is important to enter information accurately because what you enter here impacts the obligated grants in the post award phase. For example, if you establish a performance period for 36 months, but a grantee requests a 6 month no-cost extension and you try to process it in G5 as an admin action, G5 will give you an error message. You will receive the error message because the performance period established in the Subprogram is for 36 months, not 42 months.