5.1 Formalities check 

The formalities officer will check whether the fee has been paid and whether there are any obvious deficiencies as to the language requirements. If there are any deficiencies in these respects, the formalities officer will write to the national court informing it that no substantive work on the opinion will begin until the deficiencies have been remedied. However, no time limit can be imposed on the court.

If the file indicates that the court permits the parties to submit written arguments to the EPO and such arguments are not already on the file, the formalities officer will write via the court to the parties giving them a time limit (say two months) for submitting such arguments.