Which of the following codes implies that an assignment should be completed as soon as possible?

The code that signifies an assignment should be completed as soon as possible is 10-18. In the context of police codes, 10-18 generally conveys an urgency and prompts officers to expedite their response or actions regarding a particular situation or assignment. This code is commonly used to enhance operational efficiency by prioritizing tasks that require immediate attention, thus ensuring a rapid and effective police response.

The other codes do not convey the same immediacy. For instance, the code that indicates a completed assignment is 10-19, while 10-20 typically refers to the location of the officer, and 10-22 is a directive to disregard a previous message or request. Understanding these distinctions helps officers prioritize their tasks effectively in the field.