Règle correspondante
Practice Relating to Rule 28. Medical Units
Sweden’s IHL Manual (1991) considers that Article 12 of the 1977 Additional Protocol I on the protection of medical units has the status of customary law. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 2.2.3, p. 18.
Sweden’s Penal Code (1962), as amended in 1998, provides:
A person guilty of a serious violation of a treaty or agreement with a foreign power or an infraction of a generally recognised principle or tenet relating to international humanitarian law concerning armed conflicts shall be sentenced for a crime against international law to imprisonment for at most four years. Serious violations shall be understood to include:
(5) initiating an attack against establishments or installations which enjoy special protection under international law. 
Sweden, Penal Code, 1962, as amended in 1998, Chapter 22, § 6.