The important thing to note is is 90 (ninety Days). By hook and crook, Uhuru wants to be able to detain people for 90 days without charging them. You can now be held in custody ostensibly "assisting police with their inquiries" for three months.
We know that this is what Kenyatta and Moi used to do. Three months and then you are released by the court only to be re-arrested outside and presented in a new court on what used to be shamelessly called "holding charges" where the police openly admit the charges upon which they are violating your freedom are frivolous and not to be pursued to the end. Among those who suffered under these charges include Raila Odinga, Koigi Wa Wamwere, George Anyona, Mukaru Ng'ang'a, The current Chief Justice, Maina Kinyatti... the list is endless. It is baaaack!
The Bill of rights is very clear on the time between arrest and production in court. There is no way any law can limit that. In fact the very idea of limiting rights is forbidden by the constitution. So this is an attempt to invite magistrates to disobey the constitution and then hope the matter will end up in the Supreme Court where Njoki Ndung'u will re-write what her colleagues rejected:
if a police officer has reasonable grounds to believe that the detention of a person arrested beyond the twenty-four hour period is necessary, (10) Where the court grants an extension under subsection (10), such period shall not, together with the period for which the suspect was first remanded in custody, exceed ninety days.