changed requirements around availability
changed requirements around availability

feedback from @johnlsheridan is that this was particularly difficult to
satisfy

theodi/open-data-certificate,Motejl/open-data-certificate,Motejl/open-data-certificate,ahmadassaf/open-data-certificate,istvan-antal/open-data-certificate,istvan-antal/open-data-certificate,theodi/open-data-certificate,Motejl/open-data-certificate,ahmadassaf/open-data-certificate,zoul/open-data-certificate,theodi/open-data-certificate,istvan-antal/open-data-certificate,ahmadassaf/open-data-certificate,ahmadassaf/open-data-certificate,zoul/open-data-certificate,zoul/open-data-certificate,zoul/open-data-certificate,Motejl/open-data-certificate,theodi/open-data-certificate