Is it Permitted to Purchase Tefillin with Maasser Funds?

Is it Permitted to Purchase Tefillin with Maasser Funds? Halachic authorities, including the Levush (Chapter 249, Section 1), the Nachalat Shiva (Chapter 8), and the Shut Bet Din Shel Shlomo (Yoreh Deah, Chapter 1), have unanimously ruled that it is forbidden to use maasser (tithe) funds to purchase items or fulfill obligatory religious commandments such…