Do all face powders that contain zinc oxide and titanium oxide offer SPF protection?

Hi all.

I am wondering if loose or pressed powders that contain zinc oxide and titanium dioxide offer sun protection even if not labeled with an SPF rating.

Another twist is this product is labelled SPF 16 however the same product on Canadian store shelves is not labelled with an spf rating. When I contacted physicians formula they say they product is identical and contains SPF but Canadian regulations are different for packaging requirements.

My ask is regardless what the package says if the ingredient list contains thes two items can I feel safe they provide some additional SPF benefits?

Inactive Ingredients: Mica, Squalane, Lauroyl Lysine, Silica, Boron Nitride, Zinc Oxide, Kaolin, Retinyl Palmitate,Tocopheryl Acetate, Chlorphenesin, Potassium Sorbate, Sodium Dehydroacetate May Contain/Puet Contenir: Iron Oxides, Titanium Dioxide – See more at: http://www.physiciansformula.com/en-ca/productdetail/face/pressed-powder/02413.html#sthash.mR6R5CGv.dpuf

And this one:

ACTIVE INGREDIENTS: TITANIUM DIOXIDE, ZINC OXIDE. INACTIVE INGREDIENTS: MICA, TITANIUM DIOXIDE, BORON NITRIDE, ZINC STEARATE, TOCOPHERYL ACETATE, LAUROYL LYSINE, CHLORPHENESIN, POTASSIUM SORBATE, RETINYL PALMITATE. MAY CONTAIN: IRON OXIDES – See more at: http://www.physiciansformula.com/en-ca/productdetail/face/loose-powders/02449.html#sthash.xuCi2lAJ.dpuf

Thanks in advance!