Changes For Sunscreen    Your sunscreen may not be up to
standards.    On current packaging, the SPF only measures
protection from sunburn causing UVB rays, not the deeper UVA
rays which can cause cancer.   One of the new requirements by
the FDA is letting consumers know on the label how often
sunscreen should be applied. All the new labels will say water
resistant for up to 40 or 80 minutes. That means it should be
re-applied at least every 40 or 80 minutes, but more often if
you'll be getting wet.  Two words that won't be allowed on new
labels are proof and block.  For instance, the labels can't call
themselves water or sweat proof and they can't say the product
is a sun block.  The FDA says there's no such thing as a sun
block.   Look for the changes in sunscreen in place by summer
2013.