A method for determining whether a terminal is located inside a discovered Secure User Plane Location Platform (D-SLP) service area is disclosed. The method may comprise identifying a discovered Secure User Plane Location Platform (D-SLP). A terminal may receive from a home Secure User Plane Location Platform (H-SLP) an authorization to use the D-SLP. Additionally, the terminal may receive from the H-SLP a list of Area IDs within a Secure User Plane Location Platform (SLP) service area comprises a first group of Area IDs within the SLP service area. The method may comprise comparing an ID associated with a network access point for the terminal, and the list of Area IDs to determine if the terminal is inside the D-SLP service area. The method may comprise making a D-SLP use determination based on the comparison.