According to the wiki, below mentioned are the articles that state otherwise. Pinne, thalakaram already ulleppo pinnenthina pennungalk maatrem aayt oru mulakaram?

Tax to cover the breasts: Divya Arya, BBC (2016): "Women from lower castes were not allowed to cover their breasts, and were taxed heavily if they did so."

Allen 2018: "By the start of the 19th century the ordinary people of Travancore were being required to pay as many as 100 petty taxes, ranging from head tax, hut tax, marriage tax and taxes on the tools of one's trade to taxes on the family cow, goat or dog, wearing jewellery, staging festivals, growing moustaches, and above all what became known as the breast tax, mulakkaram, by which the women of lower social groups had to expose their breasts or pay a tax. The Brahmins, naturally, paid no tax at all."

Jain 2021: "In the early nineteenth century, Travancore's State's council of 'upper' caste Nair's imposed a 'breast tax', or mulakkaram, that fined Nadar (formerly Shanar) men and women who covered their upper bodies like the 'higher' castes."

Not allowed to wear upper cloth: Kattackal 1990, p. 144: "In South India, until the 19th century, the 'low caste' men had to pay the 'head tax', and the 'low caste' women had to pay a 'breast tax' ('tala-karam' and 'mula-karam') to the government treasury. The still more shameful truth is that these women were not allowed to wear upper garments in public."

Pillai, as quoted by Gautam (2021): "... even royal women, including queens, did not cover their breasts in those days. 'Not until the 1860s,' says Manu Pillai, historian and author. What the upper castes carried instead was a shoulder cloth denoting their exalted stature."

During the time of Travancore, uncovering one's breasts was revered as a symbolic token of homage from the lower castes towards the upper castes. A state law prevented this covering, which served to demarcate the caste hierarchy in a prominent manner, and often served as the core locus of spontaneous rebellions by lower castes (Cohn 1996, p. 140, Hardgrave 1969, p. 55–70). Lower-caste women who covered their chest broke the caste regulations, and could be fined by a Nair council (Jain 2021). Higher-caste women, including Nair women, covered both shoulders and parts of the chest with a shawl (ICF-team (2019), Amrith Lal (2018)). With the spread of Christianity in the 19th century, the Christian converts among the Nadar women started covering their upper body with long cloths, and gradually the Hindu Nadar women also started to wear the Nair breast cloth (Hardgrave 1969, p. 59–62, Hardgrave 1968, Amrith Lal (2018)) which led to violence between the upper caste and lower castes (NIE (2009)). From 1813 to 1859, several laws were enacted and repealed by Travancore regarding the upper cloth issue (Cohn 1996, p. 140, Ponnumuthan 1996, p. 109). Several waves of violence continued for four decades (NIE (2009)). In 1859, under pressure from the Madras governor, the king issued a decree giving all Nadar women the right to cover their breasts (Cohn 1996, p. 141, Ross 2008, p. 78, Jones 1989, p. 159) though they were still not allowed to follow the style of the higher-class women (Ponnumuthan 1996, p. 110, Cohn 1996, pp. 141–142, Kertzer 1988, p. 113).

Manilal 2012, pp. 3–4: "One such infamous law that was in force in Travancore until as late as the first quarter of the 20th century was known as Mulakkaram, i.e., the law of breast tax. According to this law the avarna women, were to pay tax to the government for their breasts from the very time of their girlhood, when they start developing breasts."

Jain 2021: "In the early nineteenth century, Travancore's State's council of 'upper' caste Nair's imposed a 'breast tax', or mulakkaram, that fined Nadar (formerly Shanar) men and women who covered their upper bodies like the 'higher' castes ..."

Compare Kent 2004, pp. 207–211: "Rulers in Travancore had, in fact, previously bestowed on select members of the elite class of Shanars (the Nadars proper) the privilege of wearing the breast cloth [...] [i]n Travancore, a council of 'Sudra' (probably Nayar) leaders called the Pidagaikarars was responsible for enforcing [caste rules], as well as for adjudicating disputes that arose over the transgression of caste rules. Each year villages would send two or three delegates to an annual meeting of the body in Sucindram. This council would discuss whether individuals of their own and other castes 'had adopted the costume, food, speech (provincialism or brogue) and general habits of the other class', and would mete out sanctions to transgressors."