In many Ashkenazy weddings, a document called tena'im is drafted and read at the Chatan's Tisch (Chattan's "table" - a separate rom or area where the groom, family members and friends gather prior to the badeken and chuppa.)
I see a copy of the text on this site, and much of it is similar to what I have seen on many tana'im documents including my wedding and that of many of my friends.
Who composed this text and when was it done?