In partnership with American Express, Porter Cable requests that all employees at the rank of supervisor and above apply for a corporate credit card

In partnership with American Express, Porter Cable requests that all employees at the rank of supervisor and above apply for a corporate credit card to be used for pay for travel, training and similar expenses.  Ima Krimnel, the manager of the distribution center, was issued a corporate card and used it to take her husband to Hawaii for their 20th wedding anniversary.

If Krimnel does not pay the charges, is Porter Cable liable? Why or why not?