Dear Malishilwant, your query is different, and the repost made is different. One is inquiring about the allowances and service award, while the second one is suggesting criteria for giving the allowances. As our learned friend Mr. Umakanthan suggested, the service period can be a major contributing factor for such allowances and seniority awards. The age on the job is the most deciding criterion, but if you do not want the service period to be a factor, discuss it with your management and implement it on your terms.
Recognition Criteria
The points mentioned by you can be considered for annual recognition based on performance. Recognition, in general, can be annual, half-yearly, and quarterly as well.