Correct option is D
The correct substitution is
should not be carried.
Explanation: “Is not be carried” is grammatically incorrect. We need a modal + be + V3 structure. “Should” fits best in context (advisory or rule-based tone).
Correct sentence: ...states that heavy equipment should not be carried…
Grammatical Rule Used: Modals like “should/must/can” are followed by base verb or “be + V3” in passive voice.
Example: Food should not be wasted.
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Information Booster: Use
modal + be + V3 structure in passive constructions with rules/guidelines.