Any qualified person who desires to become a candidate for election to the City Council shall file an application with the City Secretary within the time prescribed by Law. Such application shall clearly designate the office and, if such office is for Councilmember, the position on the City Council, by number, to which the candidate seeks election, and shall contain a sworn statement by the candidate that he or she is fully qualified under the Constitution and Laws of the State of Texas and the provisions of this Charter to hold the office he or she seeks.