Covers opening/closing sequence regulation system and method and image formation apparatus using same

A covers opening and closing sequence regulation system comprising:

• a first cover openably and closably attached to a housing;
• a second cover openably and closably attached to the housing, wherein the first and second covers are configured such that the first cover becomes openable and closable while the second cover is in a fully-closed state, and that the second cover becomes unable to be fully-closed from an opened state while the first cover is in a fully-closed state;
• and
• a regulation mechanism configured to stop the first cover in a spaced-out position, being a position spaced out from a fully-closed position of the first cover, in an operation of closing the first cover toward the fully-closed position with the second cover in an opened state,
• wherein the second cover is openable and closable while the first cover is in the spaced-out position.