Kabaddi was played across an enormous area for a very long time with no written rules. Codification came late, and the process of choosing between local versions had consequences that are still visible.
Oral rules work until strangers meet
A game learned by watching and playing needs no document, because everyone in the area shares the same understanding and disputes are settled by people who were there.
That system is entirely adequate for competition between neighboring villages, where the participants have played each other repeatedly and know the local conventions.
It breaks down as soon as teams from distant regions meet, since each arrives certain that its own version is simply how the game is played.
Organized competition forced the question
Physical culture movements, school programs and national sporting bodies began arranging competition across regions, which required agreed rules before anything could be scheduled.
Committees had to decide on court dimensions, scoring, the length of a raid and what constituted a valid touch, choosing among traditions that all had legitimate claims.
Every such decision made one region's version official and reclassified the others as variants, whatever their local standing had been.
The variants did not disappear
Circle-style kabaddi and other regional forms continued to be played and remain popular, with their own tournaments, techniques and followings separate from the standard code.
Players who grew up in one form often find the other unfamiliar, because the space, the contact and the tactical priorities genuinely differ.
That parallel existence is normal in codified sport, and the same split appears wherever a folk game was standardized while its older forms survived locally.
Standardization is what enabled everything after
Written rules made records comparable, refereeing trainable and international competition possible, none of which could exist under an oral tradition.
They also made the sport legible to institutions, which is how it entered schools, universities and multi-sport championships.
Professional leagues built directly on that foundation, since a league needs a rule book it can amend, publish and enforce consistently across a season.
Late codification left the sport flexible
Because the written code is relatively recent, administrators have amended it more readily than sports with centuries of textual precedent to defend.
Raid clocks, bonus lines and substitution rules were introduced without the constitutional arguments that similar changes provoke elsewhere.
The cost is a rule book that has changed enough to make comparison across eras awkward, which is the standard trade for a sport willing to modernize quickly.

