DOPT Office memorandum No. 35034/3/2008-Esst. (D) dated 19.5.2009 says "while implementing the MACP scheme, the differences in pay scales on account grant of finanncial upgradation under the old ACP scheme (of August 1999) and under the MACP scheme within the same cadre shall not be construed as an anamoly"

Can anybody explain this in a legal angle