What requirements do I need to meet to subscribe to a SwissCaution rental guarantee?

• Minimum age of 18 years.
• At least one tenant needs to be a Swiss national or hold a B, C or F residence permit. For G, L, N, and S permits, as well as Schengen Area nationals without a residence permit, an employment contract with a minimum duration of 12 months is required.
• Positive credit rating.
• A residential lease for an apartment in Switzerland with a minimum duration of three months.