If no written legislation directly addresses your civil dispute, Kuwaiti courts do not simply leave the matter unresolved. Under Article 1 of the Kuwait Civil Code, a judge will apply the principles of Islamic jurisprudence (Fiqh) that are most compatible with Kuwait's circumstances and interests. This means the court draws on established Islamic legal doctrine to fill any legislative gaps.
As an expat, this is practically important to understand: you cannot assume that a concept familiar from your home country's legal system will automatically apply if Kuwaiti statute law is silent on the matter. The outcome may differ significantly from what you would expect under Western civil law traditions. It is strongly advisable to consult a Kuwait-licensed lawyer before entering into any agreement or dispute where the legal basis is unclear, as the applicable Islamic legal school or opinion can vary by context.
This is general legal information, not legal advice. For advice on your specific situation, consult a lawyer licensed in Kuwait.