Finansinspektionen issued regulations requiring new mortgages with loan-to-value ratios exceeding 50 percent to be amortised, applying to all banks and credit market companies. Subsequent amendments expanded the scope to include firms authorized under the Mortgage Business Act and introduced income-based amortisation requirements for borrowers with mortgages exceeding 4.5 times their gross income. The rules also facilitate electronic transfer of amortisation documentation to support customer mobility between mortgage providers.