Analysis of information sources in references of the Wikipedia article "Sikh Light Infantry" in English language version.
Some regiments, such as the Sikh Regiment and Sikh Light Infantry, are "single class," and therefore recruit combat troops only from members of a specified class, such as Jat Sikhs and Mazhabi and Ramdasia Sikhs.
Moreover, with the exception of Gurkhas (recruited in Nepal), Sikhs remain the only community to have infantry regiments drawn exclusively from their own numbers: the Sikh Regiment (manned, though not officered, by high-caste Jat Sikhs) and the Sikh Light Infantry (manned entirely by Mazhabi, or Scheduled Caste, "untouchable" Sikhs.
Moreover, with the exception of Gurkhas (recruited in Nepal), Sikhs remain the only community to have infantry regiments drawn exclusively from their own numbers: the Sikh Regiment (manned, though not officered, by high-caste Jat Sikhs) and the Sikh Light Infantry (manned entirely by Mazhabi, or Scheduled Caste, "untouchable" Sikhs.