Final answer:
When an announcement for a position covers multiple grades and an applicant applies for these grades, the applicant must be referred for each one to ensure fair consideration according to human resource practices.
Step-by-step explanation:
If the announcement is announced for multiple grades and an applicant applies for all grades, then you MUST refer the applicant for each grade level for which they have applied. This process is important to ensure that all candidates receive fair consideration for positions for which they might be qualified. It also aligns with standard human resource practices which aim to maintain transparency and equal opportunity in the hiring process. When an announcement for a position covers multiple grades and an applicant applies for these grades, the applicant must be referred for each one to ensure fair consideration according to human resource practices.