Whether the appeal had to be dismissed as inadmissible for non-payment of the required advance of costs.
Yes. The appellant was duly warned, did not request an extension or legal aid in time, and gave no explanation for the non-payment; the appeal was therefore inadmissible.
Under Art. 69 para. 1bis LAI and Art. 47 paras. 2-3 LPA-VD, an advance of costs is generally required in invalidity-insurance appeal proceedings. If the party does not pay within the set deadline after warning, the court will not enter into the appeal.