There are International Treaties, Conventions and Agreements not least through the UN which by and large underpin those rights.
Clarifying revision:
First, those basic human rights, are, as far as I know, largely reflected in the Kenyan constitution, which is good (and unlike, say, Sudan). But they are not all absolute, in the sense that all come without any qualifications that would permit restrictions.
Second, what you have been writing at length about is on who can or cannot run for office. What the UN Human Rights Charter, for example, says is that:
Every citizen shall have the right and the opportunity, without any of the distinctions mentioned in article 2 and without unreasonable restrictions:
(a) To take part in the conduct of public affairs, directly or through freely chosen representatives;
(b) To vote and to be elected at genuine periodic elections which shall be by universal and equal suffrage and shall be held by secret ballot, guaranteeing the free expression of the will of the electors;
(c) To have access, on general terms of equality, to public service in his country.
It doesn't say that there must not be any restrictions; what is says is that there must not be
unreasonable restrictions.
Earlier you wrote that:
Note that when I said I would like to see Chapter 6 remain in the constitution I intended to clearly state that that would be subject to it not undermining, curtailing or limiting anybody's democratic rights. If people don't want anything let them get rid of it.
I'm not even sure I know what parts of Chapter 6
(of itself) can, in any way, be seen to be "undermining, curtailing or limiting anybody's democratic rights". Would you care to point them out? It could well be that you are, as many often do, confusing Chapter 6 with other, separate laws and rules, that purport to give it effect.
You should be every dictator's favorite "visiting Human Rights Expert". I am sure El Bashir would break in to a dance just hearing you say: In [Sudan] the rights are only and exactly what the Constitution says they are. He would add NOTHING ELSE!!!
Not quite. Please note that my comment on that was on Kenya and its present constitution. (See the "In Kenya ..." and the references to a part of that Constitution?). Now, what is significant about that Constitution is that
the people of Kenya voted for it, something which is not the case with Sudan's. And if Kenyans wish to claim more that what is in the current Constitution, they are free to change it. Until then, they have to make do with what they agreed to, and claiming some unspecified rights from some other place won't do much good.
Also when I write that
In Kenya, the rights are only and exactly what the Constitution says they are.
it reflects (a) the legal reality that going into a Kenyan court to claim rights that are not in the Constitution won't fly, because the law doesn't recognize any other rights, and (b)
more importantly, my view that the Constitution is already pretty good. So instead of a generic "International Treaties, Conventions and Agreements not least through the UN", what you might do is state what rights you think are missing, and we can then make progress by discussing those.