certificate

hello, one of my certificates is cmas 2 star instructor .. Belarus federation, i made it 2 years ago i have a question is it have an expire date?! dose i need to renew it every year or no?! .. because nothing in manual or standard about this part and because I'm not living there it's hard to...

Most of the time I’m here on SB i see that my connection is secure via an HTTPS connection via SSL; but ever now and then (5%~ish) I find myself on a mon secure connection and that I’m accessing SB via simple HTTP. Anyone experienced that? Or know why that is happening if I’m not simply losing...