Can Statutory Plan entitlement or eligibility be a condition for Occupational Plan Entitlement

Summary:

Our Maternity Leave Absence Type has two plans:
Priority 1 - Statutory Maternity Plan
Priority 2 - Occupational Maternity Plan

How can I make the Global Absence Plan Entitlement formula for the Occupational Maternity Plan use Statutory Maternity Plan eligibility as a criteria?
(We currently use Absence Cases to manage Statutory Plan entitlements)

I am trying to do something like:

If Service_Length = x And Statutory_Eligible = 'Y' Then (
BAND1ENTITLEMENT = y1
BAND1PAYFACTOR = z1
BAND2ENTITLEMENT = y3
BAND2PAYFACTOR = z3
)

If Service_Length = x And Statutory_Eligible <> 'Y' Then (
BAND1ENTITLEMENT = y2
BAND1PAYFACTOR = z2
BAND2ENTITLEMENT = y4
BAND2PAYFACTOR = z3