Got it! Here's the revised description with "SSU" referring to Server Start-Up:

Welcome to Toronto Roleplay Emergency Response: Liberty County in Roblox! Immerse yourself in a dynamic world of emergency response simulation set in the bustling city of Toronto.

Explore our standout features:

1. Custom Liveries: Personalize your vehicles with custom liveries, adding a unique touch to your roleplay experience.

2. Great Moderation: Enjoy a safe and enjoyable environment with our dedicated team of moderators ensuring fair play and respectful interactions at all times.

3. Daily Server Start-Up Events (SSU): Engage in daily SSU events, offering exciting challenges and opportunities for teamwork and skill development right from the server's launch.

4. Open to the Public: Our server is open to all, welcoming players of all skill levels and backgrounds to join in the action and excitement of emergency response roleplay.

Join Toronto Roleplay Emergency Response: Liberty County today and experience the thrill of saving lives and serving the community in a vibrant virtual environment!