(1) Before a prospective pupil may unconditionally attend a Montana school offering any portion of kindergarten through grade 12, that school must be provided with adequate documentation that the prospective pupil has been immunized through administration of the vaccines and on the schedules specified in this rule.

(2) Vaccines immunizing against diphtheria, pertussis, and tetanus must be administered as follows:

(a) A pupil or prospective pupil less than seven years of age must be administered four or more doses of DTP or DTAP vaccine, at least one dose of which must be given after the fourth birthday;

(b) A pupil or prospective pupil seven years old or older who has not completed the requirement in (2)(a) must receive additional doses of Td vaccine to reach a minimum of three doses of any combination of DTP, DTAP, DT or Td. Pertussis vaccine is not required for a pupil seven years of age or older;

(c) Beginning with the 2006-2007 school year, prior to entering the seventh grade, a pupil must receive a dose of vaccine containing Td if the following criteria are met:

(i) at least a five year interval must have passed since the pupil's previous doses of DTP, DTaP, DT or Td;

(ii) the pupil is 11 years of age or older; or

(iii) a dose of Td was not given to the pupil at seven years of age or older;

(d) If a pupil enters the seventh grade before reaching 11 years of age, a booster shot of Td must be administered to the pupil as soon as possible after the pupil attains that age, unless the pupil already was administered a dose of Td at seven years of age or older;

(e) DT vaccine administered to pupils less than seven years of age is acceptable only if accompanied by a medical exemption that exempts the pupil from pertussis vaccination.

(3) Polio vaccine must be administered to a prospective pupil in three or more doses of trivalent poliomyelitis vaccine, at least one dose of which must be given after the fourth birthday.

(4) Beginning with the 2005-2006 school year, the following pupils must have received two doses of live measles, mumps and rubella vaccine at/or after 12 months of age, separated by at least one month between doses:

(a) a pupil entering kindergarten, or, in the case of a school with no kindergarten, first grade; or

(b) a pupil entering any grade from seventh grade to twelfth grade who has not already received the two required doses.