Which of the following statements is correct under Section 42 of the Designs Act, 2000?

Designs Act s.42(4)(c) says nothing in the section affects a lessor's or licensor's reserved right "to supply such new parts" of the registered article as are required to keep it in repair, and s.42(4)(a) saves conditions barring the sale of other persons' goods. The s.42(3) defence is lost where the plaintiff, not being a party, proves the condition was inserted without his knowledge and consent, and the section validates nothing that is otherwise invalid.