Section 27 of the Principal Act is hereby amended by the addition of the following subsection:

"(5) A claim may be made or a notice may be served pursuant to subsection (1) of this section notwithstanding that the person making the claim or serving the notice denies or does not admit that he is a wrongdoer, and the making of the claim or serving of the notice shall not be taken as implying any admission of liability by him."