Lex Koller: National Council approves tougher legislation On 8.3. 2021, the National Council debated the revision of the Covid-19 law. Among the measures adopted is a tightening of the Lex Koller. You need to be logged in to view this content. Please Log In. Not a Member? Join Us Annual subscription "IB+ Database" CHF 95.00 incl. VAT Add to cart