The main legal principle established in the judgment is that amendments to pleadings should not be allowed if they significantly alter the cause of action, subject-matter, or prejudice the other party, especially if it impacts the available defenses.

Yahya Ali, J.

1. The plaintiff in O.S. No. 408 of 1943 on the file of the District Munsiff of Masulipatam is the petitioner. He applied by C.M.P. No. 1827 of 1944 to amend the plaint and that application was refused by the District Munsiff and the present petition arises out of that order.

2. The first defendant is the elder brother of the plaintiff. They constituted a joint family, and it is agreed between the parties that they divided. The plaintiffs case is that the partition took place about 1928, while according to the defendant the plaintiff left the village as early as 1885 abandoning his share in the family property. Ever since, the first defendant has been in enjoyment of the entire property. At present we are not concerned with the details of the defendants version. The plaintiffs case is that although the partition took place in 1928 some partition lists were prepared on 15th April, 1930, and that, the properties which fell to his share were entrusted by him to the first defendant for management under an arrangement whereby the first defendant was to collect rents and deliver the same to the plaintiff at his place. It is also his case that in pursuance of this arrangement, for three years, rents were accordingly delivered but that subsequently the first defendant committed default, and sometime later he gifted away to his daughter, the second defendant, all the items of property that fell in the said partition to the plaintiffs share. The prayer in the plaint was for possession of those lands after evicting the first and second defendants and their representatives therefrom and also for past and future mesne profits. In the application for the amendment of the plaint it was sought to add certain new paragraphs to the plaint to substantiate an alternative prayer that in case it should be held that the alleged partition of 1928 was not valid and it became necessary to consider the plaintiff and the first defendant as members of a joint family, the properties mentioned in schedule C attached to the affidavit accompanying the petition should be partitioned and separate possession should be given to the plaintiff of his share. The learned District Munsiff rejected the application on the ground that as a result of the amendment there will be a total change in the cause of action and jurisdiction from start to finish and that the defendant will be greatly prejudiced by allowing the same. He also pointed out that the petitioner had a more comprehensive and more substantial remedy by way of a regular suit for partition. The main argument of Mr. Sivaramakrishnayya, learned advocate for the petitioner is that the amendment sought does not alter the complexion of the plaint as originally framed and that it does not introduce a new subject-matter. The principle to be applied in such cases has been laid down by the Judicial Committee in Ma Shwe Mya v. Maung Mo Hnaung (1921) L.R. 48 IndAp 214 : I.L.R. 48 Cal Act rules of Court are nothing but provisions intended to secure the proper administration of justice, and it is therefore essential that they should be made to serve and be subordinate to that purpose, so that full powers of amendment must be enjoyed and should always be liberally exercised but none the less no power has yet been given to enable one distinct cause of action to be substituted for another, nor to change, by means of amendment, the subject-matter of the suit.

3. After examining the matter on the facts, their Lordships observed:

It would be a regrettable thing, if, when in fact the whole of a controversy between two parties was properly open rigid rules prevent its determination, but in this case their Lordships think that the rules do have that operation and that it was not open to the Court to permit a new case to be made. Applying this principle, this Court in Vaithilingam v. Natesa (1912)23MLJ189 refused an amendment which had the effect of converting a suit in ejectment into a suit for partition The prin