Indeed, I would say that it is an obligation but also a right.

http://acg.instructure.com/eportfolios/52212/Test_Prop_Cost_Formula__Magnum_Pharmaceuticals__Injectable_Steroids
http://csupalliativecare.instructure.com/eportfolios/30585/Bemiks_C_Ampul_Fiyat_2020__SanofiAventis__Vitamin_Shots

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Scientists confirm that the African crested rat can safely cover itself in poison and also find that the rodents may live in pairs or even family groups.