According to the emailed instructions, it's possible to make 6 submissions overall within 3 months. Is it allowed to submit predictions from two different models?

For example:

submissions in September: model1_September.csv and model2_September.csv

submissions in October: model1_October.csv and model2_October.csv

submissions in November: model1_November.csv and model2_November.csv

Please, clarify this moment. Thank you very much!