<P> The creamy layer criteria was defined as earning more than 100,000 rupees (₹ or INR, together abbreviated Rs 1 lakh) per annum in 1993, and revised to ₹ 2.5 lakh (2004), then ₹ 4.5 lakh (2008), Rs 6 lakh (2013) and Rs 8 lakh (2017). In October 2015, the National Commission for Backward Classes (NCBC) proposed that a person belonging to OBC with an annual family income of up to Rs 15 lakh should be considered as minimum ceiling for OBC . The NCBC also recommended the sub-division of OBCs into' backward',' more backward,' and' extremely backward' blocs and divide 27% quota amongst them in proportion to their population, to ensure that stronger OBCs don't corner the quota benefits . </P> <P> The Supreme Court of India defined the "creamy layer," quoting an Indian governmental office memorandum dated 8 September 1993 . The term was originally introduced in the context of reservation of jobs for certain groups in 1992 . The Supreme Court has said that the benefit of reservation should not be given to OBC children of constitutional functionaries--such as the President, Judges of the Supreme Court and High Courts, employees of central and state bureaucracies above a certain level, public sector employees, and members of the armed forces and paramilitary personnel above the rank of colonel (SCs, STs, and the unreserved are exempt now). </P> <P> The children of persons engaged in trade, industry and professions such as a doctor, lawyer, chartered accountant, income tax consultant, financial or management consultant, dental surgeon, engineer, architect, computer specialist, film artists and other film professional, author, playwright, sports person, sports professional, media professional or any other vocations of like status whose annual income is more than ₹ 600,000 (Rs 6 lakh) for a period of three consecutive years are also excluded . (OBC children belong to any family earning a total gross annual income (from sources other than salary and agricultural land) of less than Rs 6 lakh for a period of three consecutive year--as the 1993 income ceiling for the creamy layer was raised from ₹ 100,000 (Rs 1 lakh, when the office memo was accepted) to Rs 6 lakh for a period of three consecutive years (in May 2013). Individuals belonging to the creamy layer are also excluded from being categorised as "socially and educationally backward" regardless of their social / educational backwardness . </P> <P> The' creamy layer' categorization is currently meant only for the OBCs and not applied to the Scheduled Castes and Scheduled Tribes . The reasons cited for this parity is that the provisions for reservations for SC / ST are not for their economical benefits but for their social upliftment . Thus, SC / ST reservations are applicable irrespective of the financial status of the beneficiaries . </P>

What is the meaning of creamy layer and non creamy layer