Limitation of actions; assessment subsequent to regular meeting; notice

That the owner of any real estate against which assessment may be made shall have thirty days from and after the time such assessment is levied, and not longer, within which to bring suit in any court of competent jurisdiction to challenge the validity of such assessment: And provided further, That if the board of county commissioners of any such county wherein such lighting contract has been made should overlook or neglect to make said assessment at their regular July meeting each year, then such assessment may be made at any subsequent meeting, but if such assessment be made at such subsequent meeting notice in writing of the making of the same shall thereafter be immediately given to the parties against whose property such assessment has been made, and such persons shall have thirty days, and not longer, after the making of said order and levying of said assessment within which to challenge the same by suit in any court of competent jurisdiction.