The status of prEN16351 "Timber structures - Cross laminated timber - Regulations" is still "under approval" (Committee CEN/TC 124). However, I know, that the approval process is being finalized. Maybe one of member of COST Action FP1402 could tell you more details (http://www.cost.eu/COST_Actions/fps/Actions/FP1402?management).
The status of prEN16351 "Timber structures - Cross laminated timber - Regulations" is still "under approval" (CEN/TC 124). However, I know, that the approval process is being finalized. Mayby one of member of COST Action FP1402 could tell you more details.