There is only one ninja in the village at the moment who knows Space Time Techniques that are near the greatness of The Second Hokage, The Legendary Fourth Hokage, and Madara Uchiha. That is The Tenth Hokage Himself !!
OnlyOne other shinobi may learn these techniques.
To Learn Space Time Techniques, You must
Be God or Infinite Level Shinobi
Have mastered all Lightning Techniques
Write a 3000 Word essay on why you should learn these techniques and how important they are to you.
Must have a summoning contract
If you want to Learn the Rasengan Technique to go with the Space Time Jutsus... You Must
Be able to learn a Fire Release Rasengan or Regular Rasengan
* To Learn Rasengan, The Hokage must approve
And You must be either Fire or Wind Nature