Start drafting you personal statement, you should have several people read and critique it - several times. Too many students take the MACT in August after their third year. This is very dangerous. Start deciding which faculty you will approach for a letter of recommendation. You should choose a minimum of two science faculty and one non-science faculty.
Some schools have even more requirements about the letters.
When schools receive your completed application package from the application services, they will decided whether or not to ask you to specifically apply to their school. There is no standard form in this case. When you send in your secondary applications, you will also be required to have a committee letter of recommendation sent. Your individual letters will be sent to your health professions adviser, who will write a summary letter based on these letters and the adviser's own interaction with you. That summary letter and copies of the individual letters will be sent to the schools you advise the health professions adviser to send them.