Some marriage related rules -
Second marriage is indicated if the following two conditions are simultaneously satisfied:
If any of the above two conditions is not satisfied, then second marriage is denied.
(It is to be noted that signification of 7th house is omitted for the purpose of 2nd marriage.)
3. http://groups.yahoo.com/group/k_p_system/files/KSK%20RULES%20FOR%20SECOND%20MARRIAGE.doc - KP Rules for Second Marriage