Section 3.05 - Registration Numbers and Decal(1) All valid snow and recreation vehicle registrations made prior to February 1, 2011 shall have registration numbers and decals displayed in the following manner:(a)Registration Decal Placement - Snowmobile. For all snow vehicles, the registration number assigned by the Director shall:1. Be displayed on a decal provided by the Director;2. Such decal shall be affixed to the left side cowling of the snow vehicle or on the lower left side of the windshield, so as to be clearly visible; and3. The vehicle's owner shall also display in the upper left hand corner of such decal, the current validation sticker.(b)Registration Decal Placement - Recreation Vehicles. For all recreation vehicles, the registration number assigned by the Director shall be displayed on a plate provided by the Director and such plate shall be displayed on the back of such vehicle. In addition to displaying such plate, the owner of such vehicle shall display in the upper left corner of such plate the current registration decal of Division of Law Enforcement.(2) All snow and recreation vehicle registrations made on or after February 1, 2011 including registration renewals of registrations made prior to February 1, 2011 shall have registration numbers and decals displayed in the following manner:(a)Registration Number Placement. The registration number assigned to a snow vehicle or a recreation vehicle shall be painted or affixed by means of a decal or sticker firmly attached to both sides of the cowling of the vehicle and located so that both are clearly visible and not obstructed. Placement of registration numbers on dirt bikes is permissible on front fork tubes, fuel tank, or front fender so that they are clearly visible and not obstructed.(b)Registration Number Size and Visibility. The registration number assigned to a snow vehicle or a recreation vehicle shall be not be less than three inches in height and not less than one-half inch in width and shall be in a color that is in distinct contrast to the background to which the number is applied. The registration number shall be maintained in a legible condition at all times.(c)Expiration Decal. The expiration decal provided by the Director when the recreation vehicle or snow vehicle has been duly registered in accordance with 323 CMR 3.00, shall be affixed to the registration number sticker and shall be displayed on the left side of the snow vehicle or recreation vehicle.