Wow... the monarchs are going to have a busy schedule with just turning down diplomats :P
In this timeperiod the European monarchs didnt meet personally with the diplomats of other countries anymore, they had a minister of foreign affairs for that. The only way to talk to a monarch as a foreigner was to be invited by them. Some countries were even so strict with this rule that the palace guards were ordered to shoot to kill... Ever fooled around at Buckingham Palace? Then you know what I am talking about. 

Suggesting that the monarch would make time for you was rather rediculous because it would mean that you could make demands of a monarch and could get you kicled out of the country in Russia or Austria. Monarchs would only talk about diplomacy with their ministers, not the foreign diplomat. The only exception to this rule was if another monarch/president came to the country on a state visit which was agreed upon before hand by the hosting monarch.

That being said, this is ofcourse not a simulation of the 19th century, last time I checked we didnt have mechs in that century. But I just thought that it might add abit more realism if the monarchs are actually treated as such and not as a boring state dignitary.