Mandatory lighting, reflectors, registration plate, distinctive state sign, and maximum speed marking:

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Must not be covered by the transported cargo or devices used for its fastening and protection (e.g., tarp, chains, or ropes).

May be covered by the cargo if a special orange warning light is operating on the vehicle while driving.
May be covered by devices used to fasten and protect the cargo (e.g., tarp, chains, or ropes) if the cargo cannot be secured otherwise.

Legal Basis: You can find this in § 52, paragraph 2 of Act No.

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Legal basis: Zákon č. 361/2000 Sb., § 52 odst. 2

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