Final answer:
Section 7 of the Trespass to Property Act specifies that the two colours of marking for the purpose of giving notice are red and yellow.
Step-by-step explanation:
Section 7 of the Trespass to Property Act specifies that the two colours of marking for the purpose of giving notice are red and yellow. These colours are used to indicate areas where trespass is prohibited or where permission is required. For example, a red and yellow sign might be placed on a fence or gate to indicate that entry is not permitted without authorization.