x1=k1 is the positive right of / owned by x2=k2 to obligate x3=s1 to obligation / action x4=s2 by standard / under law / custom x5=k3; x2 has the right to (tu'a) x4 in the sense of active obligation.
Part of the negative rights vs. positive rights distinction. E.g. negative rights: I have the right to not be prohibited from health care. Positive rights: I have the right to obligate others to provide health care. See also: ri'urkrali (positive right), krali (right), ponse (own), bilga (obliged), marde (morality), flalu (law).