Printing apparatus and printing system

A printing system having an information transmitting device and a printing apparatus capable of processing a print job transmitted from the information transmitting device and forming an image on a recording sheet based on the print job, comprising:

• a processor;
• and
• memory storing computer readable instructions that, when executed, cause the printing apparatus to function as:
• a first determining system configured to examine an image-forming condition of the printing apparatus and determine as to whether the printing apparatus is under a condition of lowered image-forming quality;
• a second determining system configured to examine an attribute of the print job and determine based on the attribute as to whether the print job requires a predetermined level of image-forming quality, which is higher than the lowered image-forming quality, when the first determining system determines that the printing apparatus is under the condition of the lowered image-forming quality;
• and
• a restricting system configured to:
• restrict execution of the print job when the first determining system determines that the printing apparatus is under the condition of the lowered image-forming quality and the second determining system determines that the print job requires the predetermined level of image-forming quality, which is higher than the lowered image-forming quality;
• and
• not restrict execution of the print job when the first determining system determines that the printing apparatus is not under the condition of the lowered image-forming quality or the second determining system determines that the print job does not require the predetermined level of image-forming quality, which is higher than the lowered image-forming quality.