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Spain
Practice Relating to Rule 55. Access for Humanitarian Relief to Civilians in Need
Section B. Impediment of humanitarian relief
Spain’s Penal Code (1995), as amended in 2010, states:
Anyone who [commits any of the following acts] during armed conflict shall be punished with three to seven years’ imprisonment:
8. Intentionally using starvation of the civilian population as a method of warfare, depriving it of indispensable supplies … including by arbitrarily impeding the provision of [humanitarian] assistance, which is carried out in conformity with the [1949] Geneva Conventions and its [1977] Additional Protocols. 
Spain, Penal Code, 1995, as amended on 23 June 2010, Article 612(8).