Editing because I just double-checked the email. Here's what it says:
"By statute, DPS has up to 60 days to issue an original LTC, and 45 days to issue a renewal license. However, it is imperative that applicants understand that these time periods are calculated from the time a *fully-completed application AND supporting documents are received by the department. In the event more information or documents are required to complete an application, DPS has an additional 180 days to complete the review process."