Final answer:
Inability to locate the cricothyroid membrane is a relative contraindication for the performance of a cricothyrotomy.
Step-by-step explanation:
A relative contraindication for the performance of a cricothyrotomy is the inability to locate the cricothyroid membrane. The cricothyroid membrane is an important anatomical landmark that is essential for a successful cricothyrotomy procedure. If the healthcare provider is unable to locate the cricothyroid membrane, they may face difficulties in accessing the airway through this method.