Retrospective food adulteration rule amendment did not undo conviction; statutory minimum sentence was maintained despite long delay.

An amendment to food adulteration rules introducing a limited tolerance for mineral oil in hard boiled sugar confectionary did not retrospectively apply to a pending criminal appeal, because the later standard neither decriminalised the conduct nor expressly or by necessary implication displaced the law in force on the date of the offence. The conviction was therefore upheld, as the amended conditions had not been established on the existing record. The statutory minimum sentence of six months' rigorous imprisonment was also maintained, since long pendency alone did not justify reducing a lawful minimum punishment in a food adulteration case requiring strict consumer protection enforcement.

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Issues: (i) Whether the amended Food Adulteration Rules, which introduced a limited tolerance for mineral oil in hard boiled sugar confectionary, could be applied retrospectively to a pending criminal appeal so as to negate the appellant's conviction. (ii) Whether the sentence of six months' rigorous imprisonment required interference in view of the long pendency of the proceedings.

Issue (i): Whether the amended Food Adulteration Rules, which introduced a limited tolerance for mineral oil in hard boiled sugar confectionary, could be applied retrospectively to a pending criminal appeal so as to negate the appellant's conviction.

Analysis: The amendment did not decriminalise the conduct or merely lighten the punishment; it only permitted the presence of mineral oil within a narrow limit and subject to specific conditions, namely food-grade quality, use as a lubricant, and a ceiling of 0.2% by weight. A conviction had to be tested by the law in force on the date of the offence, unless the later law expressly or by necessary implication made the change retrospective. The principle that a beneficial ex post facto law may operate retrospectively did not assist the appellant, because the amended standard still required proof of facts that were neither found in the analyst's report nor established on record. The public analyst had not examined matters relevant to the amended standard since those facts were not material under the old regime.

Conclusion: The amended Rules did not retrospectively exonerate the appellant, and the conviction was upheld.

Issue (ii): Whether the sentence of six months' rigorous imprisonment required interference in view of the long pendency of the proceedings.

Analysis: The sentence imposed was the statutory minimum. The Court distinguished cases where either no minimum sentence existed or the circumstances justified extraordinary interference. Considering the nature of food adulteration offences and the need for strict enforcement of consumer protection laws, the Court found no basis to substitute the lawful minimum sentence with a lesser punishment.

Conclusion: The sentence was not interfered with and was maintained.

Final Conclusion: The conviction and the minimum sentence were affirmed, and the appeal failed in entirety.

Ratio Decidendi: An amendment to food adulteration standards does not, by itself, apply retrospectively to defeat a conviction for an offence committed before the amendment unless the later law clearly so provides, and a lawful minimum sentence will not ordinarily be reduced merely because the proceedings have remained pending for a long time.

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