Definition: an option which does not apply universally in all the instances of a rule which prescribes an operation optionally, but applies necessarily in : some cases and does not apply at all in the other cases, the total result being an option regarding the conduct of the rule. The rules अजेर्व्यघञपॊ: P. II. 4.56, लट: शतृशानचावप्रथमासमानाधिकरणे III. 2.124 and वामि I. 4.5 are some of the rules which have got an option described as व्यवस्थितविभाषा. The standard instances of व्यवस्थितविभाषा are given in the ancient verse देवत्रातो गलो ग्राहः इतियोगे च सद्विधिः | मिथस्ते न विभाष्यन्ते गवाक्षः संशितव्रतः|| M. Bh, on P, III. 3.156; VII.4.41.