I can see no reason why the owner would mind the renter having an occasional guest - and I see no reason why she would use the excuse of the building consortium if it were her reasons to begin with. It may seem strict and unreasonable, but I can say from experience that having loud, disruptive neighbors SUCKS.
I'm not saying that King_Pair would be loud and noisy, but I can certainly understand why the building consortium would have that issue. My wife is involved with preparing and renting temporary apartments with a friend of mine who runs the business. You wouldn't believe the crap that they find in these apartments - evidence of massive parties and sometimes (so it seems) massive orgies. I would not want to live in a building that had a temporary rental in it for that reason, unless it was a big building and I wasn't near.
I agree with Crema and Lucha that it shouldn't be a problem, until noise is actually a problem. It may be that you could go and talk to the consortium (I doubt the owner would be very happy about it unless she took you herself) and find out how they would feel. Also, her clause in the contract does indeed seem to specific to not having anyone in the house, which is similar, but not exact, to what the phrase from the bylaws says.
As King_Pair mentions, only the last part of the quoted bylaws seem to have any reference to the problem, and it's possible that the owner is taking that to extremes, but I do find it interesting that the bylaws specifically say to house anyone to which you would sublet the apartment in a hotel or other short-term guest housing.
I don't know that getting involved with the consortium would do anything for you, and if you can't convince the owner that having an occasional guest is OK, then it's back to whether or not you want to risk the relationship if there's any fallout.
BTW - another reason for someone not wanting anyone to stay in the apartment aside from the renter (or whoever else may be listed on the contract, I assume), may have to do with keys to the building. I don't know if there's a portero there, but I can imagine that someone staying as long as a week would have their own key made and if they aren't directly responsible for the contract, the consortium might feel that anyone else is likely to be as careful with making sure the door is locked, or letting unknown people enter behind them, or what-have you.
I'm not saying that King_Pair would be loud and noisy, but I can certainly understand why the building consortium would have that issue. My wife is involved with preparing and renting temporary apartments with a friend of mine who runs the business. You wouldn't believe the crap that they find in these apartments - evidence of massive parties and sometimes (so it seems) massive orgies. I would not want to live in a building that had a temporary rental in it for that reason, unless it was a big building and I wasn't near.
I agree with Crema and Lucha that it shouldn't be a problem, until noise is actually a problem. It may be that you could go and talk to the consortium (I doubt the owner would be very happy about it unless she took you herself) and find out how they would feel. Also, her clause in the contract does indeed seem to specific to not having anyone in the house, which is similar, but not exact, to what the phrase from the bylaws says.
As King_Pair mentions, only the last part of the quoted bylaws seem to have any reference to the problem, and it's possible that the owner is taking that to extremes, but I do find it interesting that the bylaws specifically say to house anyone to which you would sublet the apartment in a hotel or other short-term guest housing.
I don't know that getting involved with the consortium would do anything for you, and if you can't convince the owner that having an occasional guest is OK, then it's back to whether or not you want to risk the relationship if there's any fallout.
BTW - another reason for someone not wanting anyone to stay in the apartment aside from the renter (or whoever else may be listed on the contract, I assume), may have to do with keys to the building. I don't know if there's a portero there, but I can imagine that someone staying as long as a week would have their own key made and if they aren't directly responsible for the contract, the consortium might feel that anyone else is likely to be as careful with making sure the door is locked, or letting unknown people enter behind them, or what-have you.