The "Escorial Taktikon", written , records the existence of a "Domestic of the Excubitors of the East" (), and a "Domestic of the Excubitors of the West" (), as well as a subaltern "Domestic of the Excubitors". This has led to the suggestion that, probably under Romanos II (), the regiment, like the senior "Scholae", was split in two units, one for the West and one for the East, each headed by a respective Domestic. However, unlike the "Scholae", these designations no longer appear after, and they may have been of brief existence. The subaltern Domestic of the Excubitors may either by a copyist error, or, according to Vera von Falkenhausen, indicate a subordinate official in charge of Excubitors stationed in the provinces; indeed such provincial detachments are attested, albeit only for the theme of Longobardia in southern Italy and of Hellas in Greece.