The Vaxian Empire does not regulate Marriage It does not tax or treat married people any differently than any other sort of individual. Marriages are often conducted in churches, but any couple (or group) can declare themselves married and the Empire makes no distinction.
Divorce in the Empire is as simple as marriage is. If a couple is registered as married with a church, they will typically present themselves to the church for divorce. Other than that, divorce is considered to have occurred whenever all parties involved declare it to be so. If disputes over property or child custody cannot be settled amicably between the parties themselves, outside arbitration is usually necessary, but this does not have to be government arbitration.
Marriage and divorce are handled in much the same way by the government of GHOUL
Elves Elves (aside from city elves) typically do not engage in the human activity of 'marriage'. Two partners will form a life bond, which works just the same way as a typical marriage, except the ceremony itself is somewhat more private. Elves claim never to form life bonds for any reason other than pure love. Neither adultery nor breaking a life bond occurs with much frequency and both are strongly frowned upon in elven culture and result in ostracizing.
Marriage among the Nethar is typically a purely business contract, typically performed without fanfare or elaborate ceremony for the purpose of strengthening both Houses involved. Nethar occasionally marry for love, but this is frowned upon. Oddly, breaking a marriage contract is as frowned upon in Nethar culture as it is among the elves, but adultery is accepted and common (though children born from adultery are often treated as second-class citizens or simply aborted or killed, due to the importance of pedigree amongst the Nethar).
Shinkan marriage ceremonies tend to be elaborate and expensive affairs, especially among the aristocracy. Arranged marriage is very common in Shi Inkahan. Families that have had good relations in the past tend to arrange to have their children marry, or else marriages will be arranged for optimum social benefit. Upward mobility tends to be limited, as hierarchy, order, and structure are of paramount importance at all levels of society, but love marriages are not generally condemned. Divorce is generally a great scandal on the rare occasions that it occurs at all.