Do I need separate RFID for SLEX and NLEX?

Hello there, I'm curious about something regarding RFID usage for toll roads. Specifically, I'm wondering if I would need to have separate RFID tags for SLEX, which stands for South Luzon Expressway, and NLEX, which is the North Luzon Expressway. As a frequent traveler on both of these highways, I'm trying to streamline my toll payments and make sure I'm not missing any important details. Could you please clarify if separate RFID tags are necessary for each expressway, or if a single RFID tag can be used for both? Thank you in advance for your help.