Retrospective service rights cannot be taken away, but higher pay alone does not trigger automatic advancement benefits.

The SC held that retrospective legislation cannot validly extinguish accrued service rights or compel repayment of benefits already lawfully received where it operates arbitrarily or defeats final rights. Sections 2 and 3 of the Andhra Pradesh Educational Service Untrained Teachers Act, 1991 were therefore invalid to the extent they retrospectively disturbed settled pay fixation and recovery of amounts, and the statute could operate only prospectively. The Court also held that service in a higher pay scale, granted for limited administrative purposes, did not by itself satisfy the independent of the automatic advancement scheme. The claim to automatic advancement benefits was rejected.

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Issues: (i) Whether Sections 2 and 3 of the Andhra Pradesh Educational Service Untrained Teachers (Regulation of Services and Fixation of Pay) Act, 1991 could validly operate retrospectively to deprive teachers of benefits already accrued and recovered amounts already paid; (ii) Whether service rendered in higher pay scales by untrained teachers entitled them to claim the benefit of the automatic advancement scheme.

Issue (i): Whether Sections 2 and 3 of the Andhra Pradesh Educational Service Untrained Teachers (Regulation of Services and Fixation of Pay) Act, 1991 could validly operate retrospectively to deprive teachers of benefits already accrued and recovered amounts already paid.

Analysis: Retrospective legislation may be competent, but it cannot be used to destroy accrued or vested rights in a manner that is arbitrary, unreasonable, or violative of equality guarantees. The teachers had obtained benefits under executive orders and judicial decisions that had attained finality, and those rights could not be nullified by a later enactment giving the statute retrospective effect from 10-2-1967. The provisions seeking to reverse past pay fixation and compel repayment were therefore unconstitutional to that extent. The retrospective reclassification in Section 3 also could not stand in its past operation.

Conclusion: Sections 2 and 3(a), and the retrospective operation of Section 3, were struck down/read down to the extent they operated retrospectively and deprived accrued rights; the statute could operate only prospectively.

Issue (ii): Whether service rendered in higher pay scales by untrained teachers entitled them to claim the benefit of the automatic advancement scheme.

Analysis: A person officiating in a higher post or drawing its pay does not, by that fact alone, become entitled to count such service for promotion-linked or special career benefits unless the scheme's conditions are independently satisfied. The benefit of the automatic advancement scheme depended on fulfilment of its own requirements, and the higher pay arrangements made for limited administrative purposes did not create an automatic entitlement.

Conclusion: The claim to automatic advancement benefits was rejected.

Final Conclusion: The appeals succeeded in part: the retrospective deprivation and recovery provisions were invalid only to the extent they affected accrued rights, while the claim to automatic advancement benefits was not accepted.

Ratio Decidendi: A retrospective law cannot constitutionally extinguish accrued service rights or compel repayment of benefits already lawfully received, though it may regulate matters prospectively; conversely, higher pay granted for a limited purpose does not by itself confer entitlement to promotion-linked scheme benefits.

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