Regarding the swearing in of President Zuma as an ordinary MP, should he be voted out, it appears that there first has to be a vacancy.
Brian Molefe didn't seem to have too much trouble getting a job as an MP recently.

Do we have any idea of how many vacancies currently exist in the National Assembly?
What are the qualifications and processes needed to become an MP ? 
Does the position have to be advertised in the national press ?
Does an applicant submit the names of three referees, their matric certificate and qualifications?
Does the applicant have a first interview, then a second interview?

It seems to be a darn sight easier to get a job as an MP or president than it is to be employed as an engineer, or teacher , or secretary or other jobs that normal people do or maybe being an MP isn't a job.